pith. machine review for the scientific record. sign in

arxiv: 2507.06286 · v1 · submitted 2025-07-08 · ✦ hep-th · cond-mat.str-el· quant-ph

Recognition: 3 theorem links

· Lean Theorem

Krylov Complexity

Authors on Pith no claims yet

Pith reviewed 2026-05-16 14:48 UTC · model grok-4.3

classification ✦ hep-th cond-mat.str-elquant-ph
keywords Krylov complexityoperator growthquantum chaosLanczos algorithmholographic dualityblack hole physicsintegrable systems
0
0 comments X

The pith

Krylov complexity measures operator growth in quantum systems without depending on arbitrary parameters.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This review establishes Krylov complexity as a canonical way to track how operators spread and grow under time evolution in quantum many-body systems. It is built from the Lanczos algorithm, which generates a basis where complexity counts the average distance an operator has traveled. Because the definition avoids tunable parameters, the measure can be compared directly across different systems. In chaotic regimes it grows exponentially until very late times, while integrable systems show slower or bounded growth, making it a diagnostic tool. The paper also shows how this growth can be described geometrically when the system has a holographic dual description in gravity.

Core claim

Krylov complexity, defined through the Lanczos algorithm applied to the Heisenberg evolution of an initial operator, serves as a parameter-independent measure of operator spreading whose growth reliably distinguishes chaotic dynamics from integrable ones up to exponentially late times and admits a geometric interpretation in holographic duals.

What carries the argument

The Lanczos algorithm, which iteratively constructs an orthonormal Krylov basis of operators starting from an initial one and its commutator with the Hamiltonian, with complexity defined as the expectation value of the position operator in that basis.

If this is right

  • Krylov complexity grows exponentially in chaotic systems until times of order the scrambling time.
  • It admits a geometric description when the dynamics has a holographic gravity dual.
  • General theorems establish its bounded behavior in integrable systems and its universality in chaotic ones.
  • It provides a direct link between operator growth in the boundary theory and bulk gravitational spreading.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same construction could be applied to open quantum systems to track decoherence-induced spreading.
  • Experimental platforms such as trapped ions could measure the predicted late-time exponential growth directly.
  • Comparison with other operator-size measures might reveal whether Krylov complexity is the minimal parameter-free choice.
  • Extensions to finite-temperature or non-unitary evolution would test how robust the distinction between chaos and integrability remains.

Load-bearing premise

That the Lanczos procedure produces a basis whose growth properties capture the essential distinction between chaotic and integrable dynamics without hidden dependence on the choice of initial operator or normalization details.

What would settle it

A explicit calculation in a known chaotic system, such as the Sachdev-Ye-Kitaev model, where Krylov complexity remains bounded or grows at a rate indistinguishable from an integrable counterpart would falsify the claim that it serves as a robust, parameter-free probe.

read the original abstract

We introduce and review a new complexity measure, called `Krylov complexity', which takes its origins in the field of quantum-chaotic dynamics, serving as a canonical measure of operator growth and spreading. Krylov complexity, underpinned by the Lanczos algorithm, has since evolved into a highly diverse field of its own right, both because of its attractive features as a complexity, whose definition does not depend on arbitrary control parameters, and whose phenomenology serves as a rich and sensitive probe of chaotic dynamics up to exponentially late times, but also because of its relevance to seemingly far-afield subjects such as holographic dualities and the quantum physics of black holes. In this review we give a unified perspective on these topics, emphasizing the robust and most general features of K-complexity, both in chaotic and integrable systems, state and prove theorems on its generic features and describe how it is geometrised in the context of (dual) gravitational dynamics. We hope that this review will serve both as a source of intuition about K-complexity in and of itself, as well as a resource for researchers trying to gain an overview over what is by now a rather large and multi-faceted literature. We also mention and discuss a number of open problems related to K-complexity, underlining its currently very active status as a field of research.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript is a review introducing Krylov complexity as a canonical, parameter-free measure of operator growth and spreading derived from the Lanczos algorithm. It reviews its phenomenology as a probe of chaotic dynamics up to exponentially late times, states and proves theorems on generic features in both chaotic and integrable systems, and describes its geometrization in holographic dualities and black-hole physics, while highlighting open problems.

Significance. If the central claims on parameter independence and reliable distinction of dynamics hold, the review would be significant as a unifying resource that aggregates independent results, provides theorems on robust features, and connects quantum chaos to gravity. Explicit machine-checked proofs or reproducible numerical checks on generic features would strengthen its utility for the field.

major comments (2)
  1. [Introduction and definition sections] Introduction and definition sections: the claim that the definition 'does not depend on arbitrary control parameters' is load-bearing for the canonical status of K-complexity. In infinite-dimensional systems (standard in holographic models), the Lanczos algorithm requires regularization or truncation; the review must demonstrate that asymptotic growth rates remain invariant under physically equivalent choices of inner-product regularization or basis cutoff, or the independence claim is conditional.
  2. [Sections stating and proving theorems on generic features] Sections stating and proving theorems on generic features: the distinction between chaotic and integrable dynamics relies on uniqueness of the Krylov basis and reliable late-time growth. Without explicit treatment of how theorems extend to continuum limits or regularized operators, the claimed sensitivity up to exponentially late times risks being regularization-dependent.
minor comments (2)
  1. [Throughout] Ensure notation for the Lanczos coefficients and inner product is consistent across sections discussing holographic duals.
  2. [Phenomenology sections] Add explicit references to any numerical benchmarks or code repositories used to illustrate generic features, to aid reproducibility.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their careful reading of the manuscript and for highlighting these important points regarding the parameter independence of Krylov complexity and the robustness of its theorems under regularization. We address each major comment below and commit to revisions that will clarify and strengthen the relevant claims without overstating the current content of the review.

read point-by-point responses
  1. Referee: [Introduction and definition sections] Introduction and definition sections: the claim that the definition 'does not depend on arbitrary control parameters' is load-bearing for the canonical status of K-complexity. In infinite-dimensional systems (standard in holographic models), the Lanczos algorithm requires regularization or truncation; the review must demonstrate that asymptotic growth rates remain invariant under physically equivalent choices of inner-product regularization or basis cutoff, or the independence claim is conditional.

    Authors: We agree that the parameter-independence claim is central and that infinite-dimensional systems require careful regularization. The manuscript already notes the need for regularization in holographic contexts and cites literature showing that late-time growth rates are insensitive to specific cutoff choices when the regularization preserves the physical inner product. In the revised version we will expand the introduction and definition sections with a dedicated paragraph that explicitly states the conditions under which asymptotic growth rates remain invariant, referencing existing results on equivalent regularizations. This will make the canonical status claim precise rather than unconditional. revision: yes

  2. Referee: [Sections stating and proving theorems on generic features] Sections stating and proving theorems on generic features: the distinction between chaotic and integrable dynamics relies on uniqueness of the Krylov basis and reliable late-time growth. Without explicit treatment of how theorems extend to continuum limits or regularized operators, the claimed sensitivity up to exponentially late times risks being regularization-dependent.

    Authors: The theorems in the manuscript are formulated for settings in which the Krylov basis is uniquely defined, with the late-time distinction between exponential growth (chaotic) and bounded/oscillatory behavior (integrable) following from the properties of the Lanczos coefficients. We acknowledge that an explicit discussion of continuum limits is currently limited. In the revision we will add a short subsection after the theorems that outlines how the uniqueness of the basis and the late-time growth rates extend to regularized operators, drawing on the same regularization invariance arguments used in the introduction. This will directly address the potential dependence on regularization while preserving the scope of the review. revision: yes

Circularity Check

0 steps flagged

Review aggregates prior independent results; no new derivation reduces to fitted or self-defined inputs

full rationale

This is a review paper that introduces Krylov complexity via the standard Lanczos algorithm and aggregates results from prior literature. Theorems on generic features are stated and proved from the algorithm's mathematical properties without reducing any central claim (parameter independence, chaos distinction, or late-time growth) to a quantity fitted or defined within the paper itself. Self-citations are present but not load-bearing for new derivations; the paper explicitly flags open problems around regularization in infinite-dimensional cases rather than assuming uniqueness by construction. The derivation chain remains self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No new free parameters, axioms, or invented entities are introduced by this review itself; all content is drawn from the existing literature on Krylov complexity.

pith-pipeline@v0.9.0 · 5540 in / 1036 out tokens · 37460 ms · 2026-05-16T14:48:57.960506+00:00 · methodology

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Lean theorems connected to this paper

Citations machine-checked in the Pith Canon. Every link opens the source theorem in the public Lean library.

  • Cost.FunctionalEquation (T5 uniqueness), HierarchyEmergence (uniform scaling, φ-forcing) washburn_uniqueness_aczel; hierarchy_emergence_forces_phi echoes
    ?
    echoes

    ECHOES: this paper passage has the same mathematical shape or conceptual pattern as the Recognition theorem, but is not a direct formal dependency.

    Krylov complexity... canonical measure of operator growth and spreading... definition does not depend on arbitrary control parameters

  • PhiForcing; DimensionForcing (8-tick) phi_equation; eight_tick_forces_D3 echoes
    ?
    echoes

    ECHOES: this paper passage has the same mathematical shape or conceptual pattern as the Recognition theorem, but is not a direct formal dependency.

    exponential growth of K-complexity... up to exponentially late times

  • LedgerCanonicality; DimensionForcing reality_from_one_distinction echoes
    ?
    echoes

    ECHOES: this paper passage has the same mathematical shape or conceptual pattern as the Recognition theorem, but is not a direct formal dependency.

    geometrised in the context of (dual) gravitational dynamics

What do these tags mean?
matches
The paper's claim is directly supported by a theorem in the formal canon.
supports
The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
extends
The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
uses
The paper appears to rely on the theorem as machinery.
contradicts
The paper's claim conflicts with a theorem or certificate in the canon.
unclear
Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.

Forward citations

Cited by 18 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. q-Askey Deformations of Double-Scaled SYK

    hep-th 2026-05 unverdicted novelty 7.0

    q-Askey deformations of double-scaled SYK yield transfer matrices for orthogonal polynomials whose semiclassical chord dynamics map to ER bridges and new geometric transitions in sine dilaton gravity.

  2. Krylov Dynamics and Operator Growth in Time-Dependent Systems via Lie Algebras

    quant-ph 2026-05 unverdicted novelty 7.0

    A Lie-algebraic framework unifies Krylov dynamics for time-dependent Hamiltonians, yielding a quantum speed limit whose saturation requires time-commuting Hamiltonians.

  3. Emergent States and Algebras from the Double-Scaling limit of Pure States in SYK

    hep-th 2026-04 unverdicted novelty 7.0

    In double-scaled SYK, state-adapted dressed chord operators change the emergent algebra from Type II1 to Type I∞ and restore purity of KM states, unlike generic operators.

  4. Holographic Krylov Complexity for Charged, Composite and Extended Probes

    hep-th 2026-04 unverdicted novelty 7.0

    Holographic Krylov complexity for charged composite and extended probes retains universal leading large-time growth but acquires structure-dependent subleading corrections.

  5. Towards a Refinement of Krylov Complexity: Scrambling, Classical Operator Growth and Replicas

    hep-th 2026-03 unverdicted novelty 7.0

    LogK complexity via replicas distinguishes genuine scrambling from saddle effects in quantum and classical systems and refines the measure for integrable cases.

  6. Krylov Distribution and Universal Convergence of Quantum Fisher Information

    quant-ph 2026-02 unverdicted novelty 7.0

    A spectral-resolvent Krylov framework defines a distribution for quantum Fisher information and identifies universal exponential or algebraic convergence regimes based on the Liouville spectrum.

  7. Krylov Subspace Dynamics as Near-Horizon AdS$_2$ Holography

    hep-th 2026-02 unverdicted novelty 7.0

    In the continuum limit the discrete Krylov chain becomes a Klein-Gordon field in AdS2, with Lanczos growth rate α identified as πT, recovering the maximal chaos bound and requiring the Breitenlohner-Freedman bound for...

  8. Long-Range Pairing in the Kitaev Model: Krylov Subspace Signatures

    quant-ph 2026-02 unverdicted novelty 7.0

    A Krylov staggering parameter derived from Lanczos coefficients analytically distinguishes topological phases in the short-range Kitaev model and tracks boundary versus bulk control of the gap in long-range cases.

  9. Resonant level model from a Krylov perspective: Lanczos coefficients in a quadratic model

    cond-mat.str-el 2026-01 unverdicted novelty 7.0

    In the quadratic resonant level model, Lanczos coefficients of impurity operators can be tuned to arbitrary growth patterns via coupling choice, showing they do not reliably indicate integrability or chaos.

  10. Bridging Krylov Complexity and Universal Analog Quantum Simulator

    quant-ph 2026-05 unverdicted novelty 6.0

    Generalized Krylov complexity predicts the minimum time to realize target operations in analog quantum simulators such as Rydberg atom arrays.

  11. Quantum scars from holographic boson stars

    hep-th 2026-05 unverdicted novelty 6.0

    Asymptotically AdS mini-boson stars exhibit scar-like states with random-matrix chaos signatures, embedded integrable branches, low entanglement, and Krylov complexity revivals, unlike thermal black holes.

  12. Cosmological brick walls & quantum chaotic dynamics of de Sitter horizons

    hep-th 2026-03 unverdicted novelty 6.0

    Brick-wall spectra in de Sitter space show long-range chaotic signatures via spectral form factor and Krylov complexity even when conventional level repulsion is absent.

  13. Complexity and Operator Growth in Holographic 6d SCFTs

    hep-th 2026-03 unverdicted novelty 6.0

    In holographic 6d N=(1,0) SCFTs, generalized proper momentum of infalling particles grows linearly at late times, with early dynamics modified by SU(2)_R charge and quiver spreading.

  14. Deforming the Double-Scaled SYK & Reaching the Stretched Horizon From Finite Cutoff Holography

    hep-th 2026-02 unverdicted novelty 6.0

    Deformations of the double-scaled SYK model via finite-cutoff holography produce Krylov complexity as wormhole length and realize Susskind's stretched horizon proposal through targeted T² deformations in the high-ener...

  15. Krylov complexity for Lin-Maldacena geometries and their holographic duals

    hep-th 2026-04 unverdicted novelty 5.0

    In the BMN matrix model and its holographic duals, Krylov basis states and Lanczos coefficients are uniquely fixed by the model's mass parameter.

  16. Scrambling of Entanglement from Integrability to Chaos: Bootstrapped Time-Integrated Spread Complexity

    quant-ph 2026-04 unverdicted novelty 5.0

    Bootstrapped time-integrated spread complexity distinguishes ergodic regimes in quantum scrambling from integrability to chaos.

  17. Probing the Chaos to Integrability Transition in Double-Scaled SYK

    hep-th 2026-01 unverdicted novelty 5.0

    A first-order phase transition in the Berkooz-Brukner-Jia-Mamroud interpolating model causes chord number, Krylov complexity, and operator size to switch discontinuously from chaotic (linear/exponential) to quasi-inte...

  18. Quantum analogues of exponential sensitivity: from Loschmidt echo to Krylov complexity

    quant-ph 2026-04 unverdicted novelty 1.0

    This review surveys the Loschmidt echo, OTOCs, and Krylov complexity as quantum proxies for classical Lyapunov exponents in chaotic systems.

Reference graph

Works this paper leans on

297 extracted references · 297 canonical work pages · cited by 18 Pith papers · 44 internal anchors

  1. [1]

    author author Aaronson , Scott ( year 2013 ),\ @noop title Quantum computing since Democritus \ ( publisher Cambridge University Press ) NoStop

  2. [2]

    author author Adhikari , Kiran , author Adwait \ Rijal , author Ashok Kumar \ Aryal , author Mausam \ Ghimire , author Rajeev \ Singh , and\ author Christian \ Deppe ( year 2024 ),\ title title Krylov Complexity of Fermionic and Bosonic Gaussian States , \ https://doi.org/10.1002/prop.202400014 journal journal Fortsch. Phys. \ volume 72 ( number 5 ),\ pag...

  3. [3]

    author author Afrasiar , Mir , author Jaydeep \ Kumar Basak , author Bidyut \ Dey , author Kunal \ Pal , and\ author Kuntal \ Pal ( year 2023 ),\ title title Time evolution of spread complexity in quenched Lipkin Meshkov Glick model , \ https://doi.org/10.1088/1742-5468/ad0032 journal journal J. Stat. Mech. \ volume 2310 ,\ pages 103101 ,\ https://arxiv.o...

  4. [4]

    author author Aguilar-Gutierrez , Sergio E ( year 2024 ),\ title title Towards complexity in de Sitter space from the doubled-scaled Sachdev-Ye-Kitaev model , \ https://doi.org/10.1007/JHEP10(2024)107 journal journal JHEP \ volume 10 ,\ pages 107 ,\ https://arxiv.org/abs/2403.13186 arXiv:2403.13186 [hep-th] NoStop

  5. [5]

    author author Aguilar-Gutierrez , Sergio E ( year 2025 ),\ @noop title From chords and complexity to dynamical wormholes with matter: Towards a bulk double-scaled (SYK) algebra , \ https://arxiv.org/abs/2505.22716 arXiv:2505.22716 [hep-th] NoStop

  6. [6]

    author author Aguilar-Gutierrez , Sergio E , author Hugo A. \ Camargo , author Viktor \ Jahnke , author Keun-Young \ Kim , and\ author Mitsuhiro \ Nishida ( year 2025 ),\ @noop title Krylov operator complexity in holographic CFTs: Smeared boundary reconstruction and the dual proper radial momentum , \ https://arxiv.org/abs/2506.03273 arXiv:2506.03273 [hep...

  7. [7]

    author author Aguilar-Gutierrez , Sergio E , and\ author Andrew \ Rolph ( year 2023 ),\ @noop title Krylov complexity is not a measure of distance between states or operators , \ https://arxiv.org/abs/2311.04093 arXiv:2311.04093 [hep-th] NoStop

  8. [8]

    author author Aguilar-Gutierrez , Sergio E , and\ author Jiuci \ Xu ( year 2025 ),\ @noop title Geometry of Chord Intertwiner, Multiple Shocks and Switchback in Double-Scaled SYK , \ https://arxiv.org/abs/2506.19013 arXiv:2506.19013 [hep-th] NoStop

  9. [9]

    author author Aharony , Ofer , author Steven S. \ Gubser , author Juan Martin \ Maldacena , author Hirosi \ Ooguri , and\ author Yaron \ Oz ( year 2000 ),\ title title Large N field theories, string theory and gravity , \ https://doi.org/10.1016/S0370-1573(99)00083-6 journal journal Phys. Rept. \ volume 323 ,\ pages 183--386 ,\ https://arxiv.org/abs/hep-t...

  10. [10]

    author author Alday , Luis F , author Murat \ Kologlu , and\ author Alexander \ Zhiboedov ( year 2021 ),\ title title Holographic correlators at finite temperature , \ https://doi.org/10.1007/JHEP06(2021)082 journal journal JHEP \ volume 06 ,\ pages 082 ,\ https://arxiv.org/abs/2009.10062 arXiv:2009.10062 [hep-th] NoStop

  11. [11]

    author author Alhassid , Y , and\ author R. D. \ Levine ( year 1992 ),\ title title Spectral autocorrelation function in the statistical theory of energy levels , \ https://doi.org/10.1103/PhysRevA.46.4650 journal journal Physical Review A \ volume 46 ( number 8 ),\ pages 4650--4653 NoStop

  12. [12]

    author author Alishahiha , Mohsen , and\ author Souvik \ Banerjee ( year 2022 ),\ @noop title A universal approach to Krylov State and Operator complexities , \ https://arxiv.org/abs/2212.10583 arXiv:2212.10583 [hep-th] NoStop

  13. [13]

    author author Alishahiha , Mohsen , author Souvik \ Banerjee , and\ author Mohammad Javad \ Vasli ( year 2024 ),\ @noop title Krylov Complexity as a Probe for Chaos , \ https://arxiv.org/abs/2408.10194 arXiv:2408.10194 [hep-th] NoStop

  14. [14]

    author author Alishahiha , Mohsen , and\ author Mohammad Javad \ Vasli ( year 2025 ),\ title title Thermalization in Krylov basis , \ https://doi.org/10.1140/epjc/s10052-025-13757-2 journal journal Eur. Phys. J. C \ volume 85 ( number 1 ),\ pages 39 ,\ https://arxiv.org/abs/2403.06655 arXiv:2403.06655 [quant-ph] NoStop

  15. [15]

    author author Almheiri , Ahmed , author Netta \ Engelhardt , author Donald \ Marolf , and\ author Henry \ Maxfield ( year 2019 ),\ title title The entropy of bulk quantum fields and the entanglement wedge of an evaporating black hole , \ https://doi.org/10.1007/JHEP12(2019)063 journal journal JHEP \ volume 12 ,\ pages 063 ,\ https://arxiv.org/abs/1905.087...

  16. [16]

    author author Almheiri , Ahmed , author Thomas \ Hartman , author Juan \ Maldacena , author Edgar \ Shaghoulian , and\ author Amirhossein \ Tajdini ( year 2020 ),\ title title Replica Wormholes and the Entropy of Hawking Radiation , \ https://doi.org/10.1007/JHEP05(2020)013 journal journal JHEP \ volume 05 ,\ pages 013 ,\ https://arxiv.org/abs/1911.12333 ...

  17. [17]

    author author Altland , Alexander , author Dmitry \ Bagrets , author Pranjal \ Nayak , author Julian \ Sonner , and\ author Manuel \ Vielma ( year 2021 ),\ title title From operator statistics to wormholes , \ https://doi.org/10.1103/PhysRevResearch.3.033259 journal journal Phys. Rev. Res. \ volume 3 ( number 3 ),\ pages 033259 ,\ https://arxiv.org/abs/21...

  18. [18]

    \ volume 15 ,\ pages 064 ,\ https://arxiv.org/abs/2204.07583 arXiv:2204.07583 [hep-th] NoStop

    author author Altland , Alexander , author Boris \ Post , author Julian \ Sonner , author Jeremy \ van der Heijden , and\ author Erik \ Verlinde ( year 2023 ),\ title title Quantum chaos in 2D gravity , \ https://doi.org/10.21468/SciPostPhys.15.2.064 journal journal SciPost Phys. \ volume 15 ,\ pages 064 ,\ https://arxiv.org/abs/2204.07583 arXiv:2204.0758...

  19. [19]

    \ volume 11 ,\ pages 034 ,\ https://arxiv.org/abs/2008.02271 arXiv:2008.02271 [hep-th] NoStop

    author author Altland , Alexander , and\ author Julian \ Sonner ( year 2021 ),\ title title Late time physics of holographic quantum chaos , \ https://doi.org/10.21468/SciPostPhys.11.2.034 journal journal SciPost Phys. \ volume 11 ,\ pages 034 ,\ https://arxiv.org/abs/2008.02271 arXiv:2008.02271 [hep-th] NoStop

  20. [20]

    author author Ambrosini , Marco , author Eliezer \ Rabinovici , author Adri\'an \ S\'anchez-Garrido , author Ruth \ Shir , and\ author Julian \ Sonner ( year 2024 ),\ @noop title Operator K-complexity in DSSYK: Krylov complexity equals bulk length , \ https://arxiv.org/abs/2412.15318 arXiv:2412.15318 [hep-th] NoStop

  21. [21]

    author author Ammon , Martin , and\ author Johanna \ Erdmenger ( year 2015 ),\ https://doi.org/10.1017/CBO9781139136747 title Gauge/Gravity Duality: Foundations and Applications \ ( publisher Cambridge University Press ) NoStop

  22. [22]

    author author An , Yu-Sen , author Li Li , author Fu-Guo \ Yang , and\ author Run-Qiu \ Yang ( year 2022 ),\ title title Interior structure and complexity growth rate of holographic superconductor from M-theory , \ https://doi.org/10.1007/JHEP08(2022)133 journal journal JHEP \ volume 08 ,\ pages 133 ,\ https://arxiv.org/abs/2205.02442 arXiv:2205.02442 [he...

  23. [23]

    author author Anderson , P W ( year 1958 ),\ title title Absence of diffusion in certain random lattices , \ https://doi.org/10.1103/PhysRev.109.1492 journal journal Phys. Rev. \ volume 109 ,\ pages 1492--1505 NoStop

  24. [24]

    author author Anegawa , Takanori , and\ author Ryota \ Watanabe ( year 2024 ),\ title title Krylov complexity of fermion chain in double-scaled SYK and power spectrum perspective , \ https://doi.org/10.1007/JHEP11(2024)026 journal journal JHEP \ volume 11 ,\ pages 026 ,\ https://arxiv.org/abs/2407.13293 arXiv:2407.13293 [hep-th] NoStop

  25. [25]

    author author Arik , M , and\ author D. D. \ Coon ( year 1976 ),\ title title Hilbert spaces of analytic functions and generalized coherent states , \ https://doi.org/10.1063/1.522937 journal journal Journal of Mathematical Physics \ volume 17 ( number 4 ),\ pages 524--527 ,\ https://arxiv.org/abs/https://aip.scitation.org/doi/pdf/10.1063/1.522937 https:/...

  26. [26]

    author author Ashida , Yuto , author Zongping \ Gong , and\ author Masahito \ Ueda ( year 2021 ),\ title title Non-Hermitian physics , \ https://doi.org/10.1080/00018732.2021.1876991 journal journal Adv. Phys. \ volume 69 ( number 3 ),\ pages 249--435 ,\ https://arxiv.org/abs/2006.01837 arXiv:2006.01837 [cond-mat.mes-hall] NoStop

  27. [27]

    author author Auzzi , Roberto , author Stefano \ Bolognesi , author Eliezer \ Rabinovici , author Fidel I. \ Schaposnik Massolo , and\ author Gianni \ Tallarita ( year 2022 ),\ title title On the time dependence of holographic complexity for charged AdS black holes with scalar hair , \ https://doi.org/10.1007/JHEP08(2022)235 journal journal JHEP \ volume ...

  28. [28]

    author author Avdoshkin , Alexander , and\ author Anatoly \ Dymarsky ( year 2020 ),\ title title Euclidean operator growth and quantum chaos , \ https://doi.org/10.1103/PhysRevResearch.2.043234 journal journal Phys. Rev. Res. \ volume 2 ( number 4 ),\ pages 043234 ,\ https://arxiv.org/abs/1911.09672 arXiv:1911.09672 [cond-mat.stat-mech] NoStop

  29. [29]

    author author Avdoshkin , Alexander , author Anatoly \ Dymarsky , and\ author Michael \ Smolkin ( year 2024 ),\ title title Krylov complexity in quantum field theory, and beyond , \ https://doi.org/10.1007/JHEP06(2024)066 journal journal JHEP \ volume 06 ,\ pages 066 ,\ https://arxiv.org/abs/2212.14429 arXiv:2212.14429 [hep-th] NoStop

  30. [30]

    author author Baggioli , Matteo , author Kyoung-Bum \ Huh , author Hyun-Sik \ Jeong , author Xuhao \ Jiang , author Keun-Young \ Kim , and\ author Juan F. \ Pedraza ( year 2025 a ),\ title title Singular value decomposition and its blind spot for quantum chaos in non-Hermitian Sachdev-Ye-Kitaev models , \ https://doi.org/10.1103/PhysRevD.111.L101904 journ...

  31. [31]

    author author Baggioli , Matteo , author Kyoung-Bum \ Huh , author Hyun-Sik \ Jeong , author Keun-Young \ Kim , and\ author Juan F. \ Pedraza ( year 2025 b ),\ title title Krylov complexity as an order parameter for quantum chaotic-integrable transitions , \ https://doi.org/10.1103/PhysRevResearch.7.023028 journal journal Phys. Rev. Res. \ volume 7 ( numb...

  32. [32]

    author author Bagrets , Dmitry , author Alexander \ Altland , and\ author Alex \ Kamenev ( year 2016 ),\ title title Sachdev Ye Kitaev model as Liouville quantum mechanics , \ https://doi.org/10.1016/j.nuclphysb.2016.08.002 journal journal Nucl. Phys. B \ volume 911 ,\ pages 191--205 ,\ https://arxiv.org/abs/1607.00694 arXiv:1607.00694 [cond-mat.str-el] NoStop

  33. [33]

    author author Baiguera , Stefano , author Vijay \ Balasubramanian , author Pawel \ Caputa , author Shira \ Chapman , author Jonas \ Haferkamp , author Michal P. \ Heller , and\ author Nicole Yunger \ Halpern ( year 2025 ),\ @noop title Quantum complexity in gravity, quantum field theory, and quantum information science , \ https://arxiv.org/abs/2503.10753...

  34. [34]

    author author Balasubramanian , Vijay , author Pawel \ Caputa , author Javier M. \ Magan , and\ author Qingyue \ Wu ( year 2022 ),\ title title Quantum chaos and the complexity of spread of states , \ https://doi.org/10.1103/PhysRevD.106.046007 journal journal Phys. Rev. D \ volume 106 ( number 4 ),\ pages 046007 ,\ https://arxiv.org/abs/2202.06957 arXiv:...

  35. [35]

    author author Balasubramanian , Vijay , author Rathindra Nath \ Das , author Johanna \ Erdmenger , and\ author Zhuo-Yu \ Xian ( year 2025 ),\ title title Chaos and integrability in triangular billiards , \ https://doi.org/10.1088/1742-5468/adba41 journal journal J. Stat. Mech. \ volume 2025 ( number 3 ),\ pages 033202 ,\ https://arxiv.org/abs/2407.11114 a...

  36. [36]

    author author Balasubramanian , Vijay , author Albion \ Lawrence , author Javier M. \ Mag\'an , and\ author Martin \ Sasieta ( year 2024 a ),\ title title Microscopic origin of the entropy of black holes in general relativity , \ https://doi.org/10.1103/PhysRevX.14.011024 journal journal Phys. Rev. X \ volume 14 ,\ pages 011024 NoStop

  37. [37]

    author author Balasubramanian , Vijay , author Javier M. \ Magan , author Poulami \ Nandi , and\ author Qingyue \ Wu ( year 2024 b ),\ @noop title Spread complexity and the saturation of wormhole size , \ https://arxiv.org/abs/2412.02038 arXiv:2412.02038 [hep-th] NoStop

  38. [38]

    author author Balasubramanian , Vijay , author Javier M. \ Magan , and\ author Qingyue \ Wu ( year 2023 a ),\ @noop title Quantum chaos, integrability, and late times in the Krylov basis , \ https://arxiv.org/abs/2312.03848 arXiv:2312.03848 [hep-th] NoStop

  39. [39]

    \ Magan , and\ author Qingyue \ Wu ( year 2023 b ),\ title title Tridiagonalizing random matrices , \ https://doi.org/10.1103/PhysRevD.107.126001 journal journal Phys

    author author Balasubramanian , Vijay , author Javier M. \ Magan , and\ author Qingyue \ Wu ( year 2023 b ),\ title title Tridiagonalizing random matrices , \ https://doi.org/10.1103/PhysRevD.107.126001 journal journal Phys. Rev. D \ volume 107 ( number 12 ),\ pages 126001 ,\ https://arxiv.org/abs/2208.08452 arXiv:2208.08452 [hep-th] NoStop

  40. [40]

    author author Banks , Tom ( year 2010 ),\ @noop title TASI Lectures on Holographic Space-Time, SUSY and Gravitational Effective Field Theory , \ https://arxiv.org/abs/1007.4001 arXiv:1007.4001 [hep-th] NoStop

  41. [41]

    \ Hastings ( year 2010 ),\ title title Strong and weak thermalization of infinite nonintegrable quantum systems

    author author Ba \ n uls , Mar \'i Carmen , author Juan Ignacio \ Cirac , and\ author Matthew B. \ Hastings ( year 2010 ),\ title title Strong and weak thermalization of infinite nonintegrable quantum systems. \ https://api.semanticscholar.org/CorpusID:10915516 journal journal Physical review letters \ volume 106 5 ,\ pages 050405 NoStop

  42. [42]

    author author Barbon , J L F , and\ author E. Rabinovici ( year 2003 ),\ title title Very long time scales and black hole thermal equilibrium , \ https://doi.org/10.1088/1126-6708/2003/11/047 journal journal JHEP \ volume 11 ,\ pages 047 ,\ https://arxiv.org/abs/hep-th/0308063 arXiv:hep-th/0308063 NoStop

  43. [43]

    Rabinovici , author R

    author author Barb\'on , J L F , author E. Rabinovici , author R. Shir , and\ author R. Sinha ( year 2019 ),\ title title On The Evolution Of Operator Complexity Beyond Scrambling , \ https://doi.org/10.1007/JHEP10(2019)264 journal journal JHEP \ volume 10 ,\ pages 264 ,\ https://arxiv.org/abs/1907.05393 arXiv:1907.05393 [hep-th] NoStop

  44. [44]

    Velasco-Aja ( year 2025 ),\ @noop title A Note on Black Hole Entropy and Wormhole Instabilities , \ https://arxiv.org/abs/2502.00769 arXiv:2502.00769 [hep-th] NoStop

    author author Barbon , J L F , and\ author E. Velasco-Aja ( year 2025 ),\ @noop title A Note on Black Hole Entropy and Wormhole Instabilities , \ https://arxiv.org/abs/2502.00769 arXiv:2502.00769 [hep-th] NoStop

  45. [45]

    author author Barbon , Jose L F , and\ author Eliezer \ Rabinovici ( year 2014 ),\ title title Geometry And Quantum Noise , \ https://doi.org/10.1002/prop.201400044 journal journal Fortsch. Phys. \ volume 62 ,\ pages 626--646 ,\ https://arxiv.org/abs/1404.7085 arXiv:1404.7085 [hep-th] NoStop

  46. [46]

    author author Barbon , Jose L F , and\ author Eliezer \ Rabinovici ( year 2016 ),\ title title Holographic complexity and spacetime singularities , \ https://doi.org/10.1007/JHEP01(2016)084 journal journal JHEP \ volume 01 ,\ pages 084 ,\ https://arxiv.org/abs/1509.09291 arXiv:1509.09291 [hep-th] NoStop

  47. [47]

    author author Basu , Ritam , author Pratyusha \ Chowdhury , author Anirban \ Ganguly , author Souparna \ Nath , author Onkar \ Parrikar , and\ author Suprakash \ Paul ( year 2025 ),\ @noop title Wigner negativity, random matrices and gravity , \ https://arxiv.org/abs/2506.02110 arXiv:2506.02110 [hep-th] NoStop

  48. [48]

    author author Basu , Ritam , author Anirban \ Ganguly , author Souparna \ Nath , and\ author Onkar \ Parrikar ( year 2024 ),\ title title Complexity growth and the Krylov-Wigner function , \ https://doi.org/10.1007/JHEP05(2024)264 journal journal JHEP \ volume 05 ,\ pages 264 ,\ https://arxiv.org/abs/2402.13694 arXiv:2402.13694 [hep-th] NoStop

  49. [49]

    Shajidul \ Haque , author Jeff \ Murugan , and\ author Hendrik J

    author author Beetar , Cameron , author Nitin \ Gupta , author S. Shajidul \ Haque , author Jeff \ Murugan , and\ author Hendrik J. R. \ Van Zyl ( year 2024 ),\ title title Complexity and operator growth for quantum systems in dynamic equilibrium , \ https://doi.org/10.1007/JHEP08(2024)156 journal journal JHEP \ volume 08 ,\ pages 156 ,\ https://arxiv.org...

  50. [50]

    Nuovo Cim

    author author Bekenstein , J D ( year 1972 ),\ title title Black holes and the second law , \ https://doi.org/10.1007/BF02757029 journal journal Lett. Nuovo Cim. \ volume 4 ,\ pages 737--740 NoStop

  51. [51]

    author author Bekenstein , Jacob D ( year 1973 ),\ title title Black holes and entropy , \ https://doi.org/10.1103/PhysRevD.7.2333 journal journal Phys. Rev. D \ volume 7 ,\ pages 2333--2346 NoStop

  52. [52]

    author author Bekenstein , Jacob D ( year 1981 ),\ title title Universal upper bound on the entropy-to-energy ratio for bounded systems , \ https://doi.org/10.1103/PhysRevD.23.287 journal journal \ volume 23 ( number 2 ),\ pages 287--298 NoStop

  53. [53]

    \ Myers , author Shan-Ming \ Ruan , author G\'abor \ S\'arosi , and\ author Antony J

    author author Belin , Alexandre , author Robert C. \ Myers , author Shan-Ming \ Ruan , author G\'abor \ S\'arosi , and\ author Antony J. \ Speranza ( year 2022 ),\ title title Does Complexity Equal Anything? \ https://doi.org/10.1103/PhysRevLett.128.081602 journal journal Phys. Rev. Lett. \ volume 128 ( number 8 ),\ pages 081602 ,\ https://arxiv.org/abs/2...

  54. [54]

    author author Bento , Pedro H S , author Adolfo \ del Campo , and\ author Lucas C. \ C\'eleri ( year 2024 ),\ title title Krylov complexity and dynamical phase transition in the quenched Lipkin-Meshkov-Glick model , \ https://doi.org/10.1103/PhysRevB.109.224304 journal journal Phys. Rev. B \ volume 109 ( number 22 ),\ pages 224304 ,\ https://arxiv.org/abs...

  55. [55]

    author author Berkooz , Micha , author Mikhail \ Isachenkov , author Vladimir \ Narovlansky , and\ author Genis \ Torrents ( year 2019 ),\ title title Towards a full solution of the large N double-scaled SYK model , \ https://doi.org/10.1007/JHEP03(2019)079 journal journal JHEP \ volume 03 ,\ pages 079 ,\ https://arxiv.org/abs/1811.02584 arXiv:1811.02584 ...

  56. [56]

    author author Berkooz , Micha , and\ author Ohad \ Mamroud ( year 2024 ),\ title title A cordial introduction to double scaled syk , \ @noop journal Reports on Progress in Physics \ NoStop

  57. [57]

    journal author author Berkooz , Micha , author Prithvi \ Narayan , and\ author Joan \ Simon ( year 2018 ),\ title title Chord diagrams, exact correlators in spin glasses and black hole bulk reconstruction , \ https://doi.org/10.1007/JHEP08(2018)192 journal journal JHEP \ volume 08 ,\ pages 192 ,\ https://arxiv.org/abs/1806.04380 arXiv:1806.04380 [hep-th] NoStop

  58. [58]

    Tabor ( year 1977 ),\ title title Level clustering in the regular spectrum , \ http://www.jstor.org/stable/79349 journal journal Proceedings of the Royal Society of London

    author author Berry , M V , and\ author M. Tabor ( year 1977 ),\ title title Level clustering in the regular spectrum , \ http://www.jstor.org/stable/79349 journal journal Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences \ volume 356 ( number 1686 ),\ pages 375--394 NoStop

  59. [59]

    author author Bethe , H ( year 1931 ),\ title title Zur Theorie der Metalle , \ https://doi.org/10.1007/BF01341708 journal journal Zeitschrift fur Physik \ volume 71 ( number 3-4 ),\ pages 205--226 NoStop

  60. [60]

    author author Bhattacharjee , Budhaditya , author Xiangyu \ Cao , author Pratik \ Nandy , and\ author Tanay \ Pathak ( year 2022 a ),\ title title Krylov complexity in saddle-dominated scrambling , \ https://doi.org/10.1007/JHEP05(2022)174 journal journal JHEP \ volume 05 ,\ pages 174 ,\ https://arxiv.org/abs/2203.03534 arXiv:2203.03534 [quant-ph] NoStop

  61. [61]

    author author Bhattacharjee , Budhaditya , author Xiangyu \ Cao , author Pratik \ Nandy , and\ author Tanay \ Pathak ( year 2023 a ),\ title title Operator growth in open quantum systems: lessons from the dissipative SYK , \ https://doi.org/10.1007/JHEP03(2023)054 journal journal JHEP \ volume 03 ,\ pages 054 ,\ https://arxiv.org/abs/2212.06180 arXiv:2212...

  62. [62]

    author author Bhattacharjee , Budhaditya , and\ author Pratik \ Nandy ( year 2025 ),\ title title Krylov fractality and complexity in generic random matrix ensembles , \ https://doi.org/10.1103/PhysRevB.111.L060202 journal journal Phys. Rev. B \ volume 111 ( number 6 ),\ pages L060202 ,\ https://arxiv.org/abs/2407.07399 arXiv:2407.07399 [quant-ph] NoStop

  63. [63]

    author author Bhattacharjee , Budhaditya , author Pratik \ Nandy , and\ author Tanay \ Pathak ( year 2023 b ),\ @noop title Operator dynamics in Lindbladian SYK: a Krylov complexity perspective , \ https://arxiv.org/abs/2311.00753 arXiv:2311.00753 [quant-ph] NoStop

  64. [64]

    author author Bhattacharjee , Budhaditya , author Samudra \ Sur , and\ author Pratik \ Nandy ( year 2022 b ),\ title title Probing quantum scars and weak ergodicity breaking through quantum complexity , \ https://doi.org/10.1103/PhysRevB.106.205150 journal journal Phys. Rev. B \ volume 106 ( number 20 ),\ pages 205150 ,\ https://arxiv.org/abs/2208.05503 a...

  65. [65]

    author author Bhattacharya , Aranya , author Rathindra Nath \ Das , author Bidyut \ Dey , and\ author Johanna \ Erdmenger ( year 2024 a ),\ title title Spread complexity and localization in PT-symmetric systems , \ https://doi.org/10.1103/PhysRevB.110.064320 journal journal Phys. Rev. B \ volume 110 ( number 6 ),\ pages 064320 ,\ https://arxiv.org/abs/240...

  66. [66]

    author author Bhattacharya , Aranya , author Rathindra Nath \ Das , author Bidyut \ Dey , and\ author Johanna \ Erdmenger ( year 2024 b ),\ title title Spread complexity for measurement-induced non-unitary dynamics and Zeno effect , \ https://doi.org/10.1007/JHEP03(2024)179 journal journal JHEP \ volume 03 ,\ pages 179 ,\ https://arxiv.org/abs/2312.11635 ...

  67. [67]

    author author Bhattacharya , Aranya , author Pratik \ Nandy , author Pingal Pratyush \ Nath , and\ author Himanshu \ Sahu ( year 2022 ),\ title title Operator growth and Krylov construction in dissipative open quantum systems , \ https://doi.org/10.1007/JHEP12(2022)081 journal journal JHEP \ volume 12 ,\ pages 081 ,\ https://arxiv.org/abs/2207.05347 arXiv...

  68. [68]

    author author Bhattacharya , Aranya , author Pratik \ Nandy , author Pingal Pratyush \ Nath , and\ author Himanshu \ Sahu ( year 2023 ),\ @noop title On Krylov complexity in open systems: an approach via bi-Lanczos algorithm , \ https://arxiv.org/abs/2303.04175 arXiv:2303.04175 [quant-ph] NoStop

  69. [69]

    author author Bhattacharya , Aranya , author Pingal Pratyush \ Nath , and\ author Himanshu \ Sahu ( year 2024 c ),\ title title Krylov complexity for nonlocal spin chains , \ https://doi.org/10.1103/PhysRevD.109.066010 journal journal Phys. Rev. D \ volume 109 ( number 6 ),\ pages 066010 ,\ https://arxiv.org/abs/2312.11677 arXiv:2312.11677 [quant-ph] NoStop

  70. [70]

    author author Bhattacharya , Aranya , author Pingal Pratyush \ Nath , and\ author Himanshu \ Sahu ( year 2024 d ),\ title title Speed limits to the growth of Krylov complexity in open quantum systems , \ https://doi.org/10.1103/PhysRevD.109.L121902 journal journal Phys. Rev. D \ volume 109 ( number 12 ),\ pages L121902 ,\ https://arxiv.org/abs/2403.03584 ...

  71. [71]

    author author Bhattacharyya , Arpan , author Debodirna \ Ghosh , and\ author Poulami \ Nandi ( year 2023 a ),\ @noop title Operator growth and Krylov Complexity in Bose-Hubbard Model , \ https://arxiv.org/abs/2306.05542 arXiv:2306.05542 [hep-th] NoStop

  72. [72]

    author author Bhattacharyya , Arpan , author S. Shajidul \ Haque , author Ghadir \ Jafari , author Jeff \ Murugan , and\ author Dimakatso \ Rapotu ( year 2023 b ),\ @noop title Krylov Complexity and Spectral Form Factor for Noisy Random Matrix Models , \ https://arxiv.org/abs/2307.15495 arXiv:2307.15495 [hep-th] NoStop

  73. [73]

    author author Blommaert , Andreas , author Jorrit \ Kruthoff , and\ author Shunyu \ Yao ( year 2023 ),\ title title An integrable road to a perturbative plateau , \ https://doi.org/10.1007/JHEP04(2023)048 journal journal JHEP \ volume 04 ,\ pages 048 ,\ https://arxiv.org/abs/2208.13795 arXiv:2208.13795 [hep-th] NoStop

  74. [74]

    author author Blommaert , Andreas , author Thomas G. \ Mertens , and\ author Jacopo \ Papalini ( year 2025 ),\ title title The dilaton gravity hologram of double-scaled SYK , \ https://doi.org/10.1007/JHEP06(2025)050 journal journal JHEP \ volume 06 ,\ pages 050 ,\ https://arxiv.org/abs/2404.03535 arXiv:2404.03535 [hep-th] NoStop

  75. [75]

    author author Blommaert , Andreas , author Thomas G. \ Mertens , and\ author Shunyu \ Yao ( year 2024 ),\ title title Dynamical actions and q-representation theory for double-scaled SYK , \ https://doi.org/10.1007/JHEP02(2024)067 journal journal JHEP \ volume 02 ,\ pages 067 ,\ https://arxiv.org/abs/2306.00941 arXiv:2306.00941 [hep-th] NoStop

  76. [76]

    Loinger ( year 1957 ),\ title title Quantum recurrence theorem , \ https://doi.org/10.1103/PhysRev.107.337 journal journal Phys

    author author Bocchieri , P , and\ author A. Loinger ( year 1957 ),\ title title Quantum recurrence theorem , \ https://doi.org/10.1103/PhysRev.107.337 journal journal Phys. Rev. \ volume 107 ,\ pages 337--338 NoStop

  77. [77]

    author author Bohigas , O , author M. J. \ Giannoni , and\ author C. Schmit ( year 1984 ),\ title title Characterization of chaotic quantum spectra and universality of level fluctuation laws , \ https://doi.org/10.1103/PhysRevLett.52.1 journal journal Phys. Rev. Lett. \ volume 52 ,\ pages 1--4 NoStop

  78. [78]

    author author Bolognesi , Stefano , author Eliezer \ Rabinovici , and\ author Shubho R. \ Roy ( year 2018 ),\ title title On Some Universal Features of the Holographic Quantum Complexity of Bulk Singularities , \ https://doi.org/10.1007/JHEP06(2018)016 journal journal JHEP \ volume 06 ,\ pages 016 ,\ https://arxiv.org/abs/1802.02045 arXiv:1802.02045 [hep-...

  79. [79]

    author author Brenes , Marlon , author John \ Goold , and\ author Marcos \ Rigol ( year 2020 ),\ title title Low-frequency behavior of off-diagonal matrix elements in the integrable xxz chain and in a locally perturbed quantum-chaotic xxz chain , \ https://doi.org/10.1103/PhysRevB.102.075127 journal journal Phys. Rev. B \ volume 102 ,\ pages 075127 NoStop

  80. [80]

    author author Brenes , Marlon , author Eduardo \ Mascarenhas , author Marcos \ Rigol , and\ author John \ Goold ( year 2018 ),\ title title High-temperature coherent transport in the xxz chain in the presence of an impurity , \ https://doi.org/10.1103/PhysRevB.98.235128 journal journal Phys. Rev. B \ volume 98 ,\ pages 235128 NoStop

Showing first 80 references.