Effective delocalization in the one-dimensional Anderson model with stealthy disorder
Pith reviewed 2026-05-18 16:28 UTC · model grok-4.3
The pith
Stealthy disorder allows localization length to exceed system size in finite 1D Anderson chains at fixed small disorder strength.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
In the one-dimensional Anderson model with stealthy disorder, for fixed energy and small but finite disorder strength W, there exists for any finite length system a range of stealthiness chi for which the localization length exceeds the system size. The leading terms in the perturbation expansion of the localization length vanish identically for a progressively larger number of terms as chi increases, so that the localization length scales as W to the power of minus 2n with arbitrarily large n, unlike the W to the minus 2 scaling for uncorrelated disorder.
What carries the argument
Stealthy disorder, defined as disorder whose power spectrum vanishes over a continuous band of wave numbers; it suppresses low-wave-number scattering contributions in the self-energy expansion.
If this is right
- The scaling of the localization length with disorder strength changes from W^{-2} to W^{-2n} for arbitrarily large n as stealthiness increases.
- The same spectral mechanism for effective delocalization applies directly to photonic and phononic wave systems.
- Numerical simulations of the model confirm the analytical predictions for the range of chi where localization length exceeds system size.
Where Pith is reading between the lines
- Materials engineered with stealthy spectral gaps might sustain extended states over longer distances than expected from uncorrelated disorder alone.
- The approach could be tested in optical or acoustic layered media by measuring transmission lengths as a function of the stealthiness parameter.
- Similar spectral engineering might alter localization properties in higher-dimensional tight-binding models or in systems with other forms of correlated disorder.
Load-bearing premise
The perturbative expansion of the self-energy remains valid and captures the leading scaling for small but finite disorder strength W and finite system sizes, with the power spectrum exactly vanishing over the defined continuous band.
What would settle it
Compute the localization length numerically for fixed small W, fixed energy, and increasing system size L while holding chi in the predicted range; the length should continue to exceed L rather than saturate or fall below it.
Figures
read the original abstract
We study analytically and numerically the Anderson model in one dimension with "stealthy" disorder, defined as having a power spectrum that vanishes in a continuous band of wave numbers. Motivated by recent studies on the optical transparency properties of stealthy hyperuniform layered media, we compute the localization length using a perturbative expansion of the self-energy. We find that, for fixed energy and small but finite disorder strength $W$, there exists for any finite length system a range of stealthiness $\chi$ for which the localization length exceeds the system size. This kind of "effective delocalization" is the result of the novel kind of correlated disorder that spans a continuous range of length scales, a defining characteristic of stealthy systems. Unlike uncorrelated disorder, for which the localization length $\xi$ scales as $W^{-2}$ to leading order for small W, the leading order terms in the perturbation expansion of $\xi$ for stealthy disordered systems vanish identically for a progressively large number of terms as $\chi$ increases such that $\xi$ scales as $W^{-2n}$ with arbitrarily large $n$. Moreover, we support our analytical results with numerical simulations. Our results introduce stealthy disorder into quantum tight-binding models and show that enforcing a low-$k$ spectral gap markedly alters the scattering landscape, enabling localization lengths that exceed the system size at fixed disorder strength. Since this mechanism relies only on the spectral properties of the disorder, it carries over directly to photonic and phononic wave systems.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript studies the 1D Anderson model with stealthy disorder whose power spectrum vanishes over a continuous band of wave numbers. Using a perturbative expansion of the self-energy, the authors show that the leading low-order contributions to the inverse localization length vanish identically as the stealthiness parameter χ increases; consequently the localization length scales as W^{-2n} with n growing with χ. This implies that, for fixed energy and small but finite disorder strength W, there exists a range of χ such that the localization length exceeds any finite system size L, producing effective delocalization. Numerical simulations are presented in support of the analytic scaling.
Significance. If the perturbative analysis remains controlled in the regime of interest, the result identifies a concrete spectral mechanism—vanishing of a continuous band in the disorder power spectrum—that systematically suppresses localization to arbitrarily high orders in W. This mechanism is independent of microscopic details and therefore transfers directly to photonic and phononic wave equations. The work thereby adds a new, tunable route to engineering long localization lengths at fixed disorder strength.
major comments (2)
- [§3] §3 (perturbative self-energy): when the first n−1 diagrams vanish identically because S(k)=0 for |k|<k_c(χ), the radius of convergence of the remaining series in W is not estimated. For fixed finite W the suppression of leading terms can shrink the domain of validity; without an explicit bound on the remainder or a comparison of the retained term against the neglected higher orders, it is unclear whether the W^{-2n} scaling still dominates the inverse localization length.
- [§4] §4 (numerics): the finite-L realizations possess only discrete Fourier modes that approximate the continuous-band vanishing. The manuscript should demonstrate that the observed ξ>L is quantitatively consistent with the perturbative prediction rather than arising from finite-size corrections or from the discrete approximation to S(k)=0; a direct comparison of the numerically extracted scaling exponent versus the analytic n(χ) is needed.
minor comments (2)
- [Introduction] The definition of the stealthiness parameter χ and the precise relation between the gap width k_c and χ should be stated explicitly in the introduction before the perturbative calculation begins.
- [Figure 2] Figure captions should specify the number of disorder realizations and the precise range of system sizes used to extract the localization length.
Simulated Author's Rebuttal
We thank the referee for the careful reading of our manuscript and the constructive comments. We address each major comment below and have revised the manuscript to incorporate additional discussion and comparisons where appropriate.
read point-by-point responses
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Referee: [§3] §3 (perturbative self-energy): when the first n−1 diagrams vanish identically because S(k)=0 for |k|<k_c(χ), the radius of convergence of the remaining series in W is not estimated. For fixed finite W the suppression of leading terms can shrink the domain of validity; without an explicit bound on the remainder or a comparison of the retained term against the neglected higher orders, it is unclear whether the W^{-2n} scaling still dominates the inverse localization length.
Authors: We agree that an explicit estimate of the radius of convergence would provide additional rigor. The perturbative expansion follows the standard weak-disorder approach, with the exact vanishing of low-order diagrams enforced by the continuous spectral gap in S(k). For sufficiently small W the first non-vanishing term of order W^{2n} dominates higher-order contributions (O(W^{2(n+1)}) and beyond) whenever W^2 ≪ 1. We have added a paragraph in the revised §3 that discusses this regime of validity and supplies a heuristic bound showing that the leading term controls the inverse localization length for the parameter range of interest. A fully rigorous non-perturbative bound on the remainder lies beyond the scope of the present work. revision: yes
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Referee: [§4] §4 (numerics): the finite-L realizations possess only discrete Fourier modes that approximate the continuous-band vanishing. The manuscript should demonstrate that the observed ξ>L is quantitatively consistent with the perturbative prediction rather than arising from finite-size corrections or from the discrete approximation to S(k)=0; a direct comparison of the numerically extracted scaling exponent versus the analytic n(χ) is needed.
Authors: We appreciate this suggestion for strengthening the numerical validation. In the revised manuscript we have added a direct comparison in §4: for several values of χ we extract an effective scaling exponent from the numerical localization lengths and compare it to the analytic prediction n(χ). The extracted exponents agree with the expected n(χ) within statistical errors for the system sizes employed, and we include a brief discussion showing that finite-size corrections and the discrete-mode approximation become negligible for the L values used. These additions confirm that the observed ξ > L is consistent with the perturbative scaling. revision: yes
Circularity Check
No circularity: scaling follows directly from perturbative expansion on the spectral definition of stealthy disorder
full rationale
The paper defines stealthy disorder by the property that its power spectrum vanishes identically over a continuous band of wave numbers. It then applies the standard perturbative expansion of the self-energy (standard in 1D Anderson localization) and observes that this definition forces successive low-order diagrams to vanish, yielding the higher-order scaling ξ ~ W^{-2n} with n increasing in χ. This is a direct algebraic consequence of the input spectral condition rather than a fitted parameter, self-referential definition, or load-bearing self-citation. The central claim that ξ can exceed finite L for small but finite W and sufficient χ is therefore derived from the given disorder class plus perturbation theory; numerical checks are invoked as independent support. No step reduces by the paper's own equations to a tautology or presupposed result.
Axiom & Free-Parameter Ledger
free parameters (2)
- disorder strength W
- stealthiness χ
axioms (2)
- domain assumption The disorder potential is drawn from a distribution whose power spectrum vanishes identically over a continuous interval of wave numbers.
- standard math Standard diagrammatic or self-energy perturbation theory for the Anderson model applies directly when the disorder is correlated.
Lean theorems connected to this paper
-
IndisputableMonolith/Cost/FunctionalEquation.leanwashburn_uniqueness_aczel unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
We compute the localization length using a perturbative expansion of the self-energy... the leading order terms in the perturbation expansion of ξ for stealthy disordered systems vanish identically for a progressively large number of terms as χ increases such that ξ scales as W^{-2n}
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IndisputableMonolith/Foundation/AlexanderDuality.leanalexander_duality_circle_linking unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
stealthy hyperuniform disorder... S(q)=Θ(|q|−k0)
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.
Reference graph
Works this paper leans on
-
[1]
P. W. Anderson, Absence of diffusion in certain random lattices, Phys. Rev.109, 1492 (1958)
work page 1958
-
[2]
F. Evers and A. D. Mirlin, Anderson transitions, Reviews of Modern Physics80, 1355 (2008)
work page 2008
-
[3]
E. Abrahams, P. W. Anderson, D. C. Licciardello, and T. V. Ramakrishnan, Scaling theory of localization: Ab- sence of quantum diffusion in two dimensions, Phys. Rev. Lett.42, 673 (1979)
work page 1979
-
[4]
Y. Ueoka and K. Slevin, Dimensional dependence of crit- ical exponent of the anderson transition in the orthogo- nal universality class, Journal of the Physical Society of Japan83, 084711 (2014)
work page 2014
-
[5]
E. Tarquini, G. Biroli, and M. Tarzia, Critical proper- ties of the anderson localization transition and the high- dimensional limit, Phys. Rev. B95, 094204 (2017)
work page 2017
-
[6]
B. L. Altshuler, V. E. Kravtsov, A. Scardicchio, P. Sier- ant, and C. Vanoni, Renormalization group for ander- son localization on high-dimensional lattices, Proceedings of the National Academy of Sciences122, e2423763122 (2025)
work page 2025
-
[7]
K. S. Tikhonov, A. D. Mirlin, and M. A. Skvortsov, Anderson localization and ergodicity on random regular graphs, Phys. Rev. B94, 220203 (2016)
work page 2016
-
[8]
S. Bera, G. De Tomasi, I. M. Khaymovich, and A. Scardicchio, Return probability for the anderson model on the random regular graph, Phys. Rev. B98, 134205 (2018)
work page 2018
-
[9]
P. Sierant, M. Lewenstein, and A. Scardicchio, Univer- sality in anderson localization on random graphs with varying connectivity, SciPost Physics15, 045 (2023)
work page 2023
-
[10]
C. Vanoni, B. L. Altshuler, V. E. Kravtsov, and A. Scardicchio, Renormalization group analysis of the anderson model on random regular graphs, Pro- ceedings of the National Academy of Sciences121, 10.1073/pnas.2401955121 (2024)
-
[11]
Derrida, Random-Energy Model: Limit of a Family of Disordered Models, Phys
B. Derrida, Random-Energy Model: Limit of a Family of Disordered Models, Phys. Rev. Lett.45, 79 (1980)
work page 1980
-
[12]
C. L. Baldwin, C. R. Laumann, A. Pal, and A. Scardic- chio, The many-body localized phase of the quantum ran- dom energy model, Physical Review B93, 10.1103/phys- revb.93.024202 (2016)
-
[13]
F. Balducci, G. Bracci Testasecca, J. Niedda, A. Scardic- chio, and C. Vanoni, Scaling analysis and renormalization group on the mobility edge in the quantum random en- ergy model, Phys. Rev. B111, 214206 (2025)
work page 2025
-
[14]
B. L. Altshuler, Y. Gefen, A. Kamenev, and L. S. Levitov, Quasiparticle lifetime in a finite system: A nonperturba- tive approach, Phys. Rev. Lett.78, 2803 (1997)
work page 1997
- [15]
-
[16]
V. Oganesyan and D. A. Huse, Localization of interact- ing fermions at high temperature, Physical review b75, 155111 (2007)
work page 2007
-
[17]
V. Ros, M. M¨ uller, and A. Scardicchio, Integrals of mo- tion in the many-body localized phase, Nucl. Phys. B 891, 420 (2015)
work page 2015
-
[18]
K. Tikhonov and A. Mirlin, From anderson localization on random regular graphs to many-body localization, Ann. Phys.435, 168525 (2021)
work page 2021
- [19]
-
[20]
P. A. Lee and T. Ramakrishnan, Disordered electronic systems, Reviews of modern physics57, 287 (1985)
work page 1985
-
[21]
S. Aubry and G. Andr´ e, Proceedings of the viii in- ternational colloquium on group-theoretical methods in physics, Annals of the Israel Physical Society3(1980)
work page 1980
-
[22]
H. P. L¨ uschen, S. Scherg, T. Kohlert, M. Schreiber, P. Bordia, X. Li, S. Das Sarma, and I. Bloch, Single- particle mobility edge in a one-dimensional quasiperiodic optical lattice, Phys. Rev. Lett.120, 160404 (2018)
work page 2018
-
[23]
S. Ganeshan, J. H. Pixley, and S. Das Sarma, Nearest neighbor tight binding models with an exact mobility edge in one dimension, Phys. Rev. Lett.114, 146601 (2015)
work page 2015
-
[24]
J. Biddle and S. Das Sarma, Predicted mobility edges in one-dimensional incommensurate optical lattices: An ex- actly solvable model of anderson localization, Phys. Rev. Lett.104, 070601 (2010). 8
work page 2010
-
[25]
M. Gon¸ calves, B. Amorim, E. V. Castro, and P. Ribeiro, Critical phase dualities in 1d exactly solvable quasiperi- odic models, Phys. Rev. Lett.131, 186303 (2023)
work page 2023
-
[26]
D. H. Dunlap, H.-L. Wu, and P. W. Phillips, Absence of localization in a random-dimer model, Phys. Rev. Lett. 65, 88 (1990)
work page 1990
-
[27]
P. Phillips and H.-L. Wu, Localization and its absence: A new metallic state for conducting polymers, Science252, 1805 (1991)
work page 1991
-
[28]
L. Sanchez-Palencia, D. Cl´ ement, P. Lugan, P. Bouyer, G. V. Shlyapnikov, and A. Aspect, Anderson localiza- tion of expanding bose-einstein condensates in random potentials, Phys. Rev. Lett.98, 210401 (2007)
work page 2007
- [29]
-
[31]
A. Dikopoltsev, S. Weidemann, M. Kremer, A. Stein- furth, H. H. Sheinfux, A. Szameit, and M. Segev, Obser- vation of anderson localization beyond the spectrum of the disorder, Science Advances8, eabn7769 (2022)
work page 2022
- [32]
- [33]
-
[34]
Localization Transition for Interacting Quantum Particles in Colored-Noise Disorder
G. Morpurgo, L. Sanchez-Palencia, and T. Giamarchi, Localization transition for interacting quantum particles in colored-noise disorder (2025), arXiv:2507.11308 [cond- mat.dis-nn]
work page internal anchor Pith review Pith/arXiv arXiv 2025
-
[35]
F. M. Izrailev and A. A. Krokhin, Localization and the mobility edge in one-dimensional potentials with corre- lated disorder, Phys. Rev. Lett.82, 4062 (1999)
work page 1999
-
[36]
F. M. Izrailev, A. A. Krokhin, and N. M. Makarov, Anomalous localization in low-dimensional systems with correlated disorder, Physics Reports Anomalous localiza- tion in low-dimensional systems with correlated disorder, 512, 125 (2012)
work page 2012
-
[37]
F. M. Izrailev, T. Kottos, and G. P. Tsironis, Hamilto- nian map approach to resonant states in paired correlated binary alloys, Phys. Rev. B52, 3274 (1995)
work page 1995
-
[38]
S. Torquato and F. H. Stillinger, Local density fluctu- ations, hyperuniform systems, and order metrics, Phys. Rev. E68, 041113 (2003)
work page 2003
-
[39]
Torquato, Hyperuniform states of matter, Phys
S. Torquato, Hyperuniform states of matter, Phys. Rep. 745, 1 (2018)
work page 2018
-
[40]
S. Torquato, G. Zhang, and M. de Courcy-Ireland, Un- covering multiscale order in the prime numbers via scat- tering, J. Stat. Mech.: Theory & Exper.2018, 093401 (2018)
work page 2018
-
[41]
S. Torquato, A. Scardicchio, and C. E. Zachary, Point processes in arbitrary dimension from Fermionic gases, random matrix theory, and number theory, J. Stat. Mech.: Theory Exp.2008, P11019
work page 2008
-
[42]
Y. Jiao, T. Lau, H. Hatzikirou, M. Meyer-Hermann, C. Corbo, and S. Torquato, Avian photoreceptor patterns represent a disordered hyperuniform solution to a mul- tiscale packing problem, Physical Review E89, 022721 (2014)
work page 2014
- [43]
-
[44]
O. Uche, F. Stillinger, and S. Torquato, Constraints on collective density variables: Two dimensions, Physical Review E70, 046122 (2004)
work page 2004
- [45]
- [46]
- [47]
-
[48]
S. Torquato, Diffusion spreadability as a probe of the mi- crostructure of complex media across length scales, Phys. Rev. E104, 054102 (2021)
work page 2021
- [49]
- [50]
- [51]
- [52]
-
[53]
S. Torquato and J. Kim, Nonlocal effective electromag- netic wave characteristics of composite media: Beyond the quasistatic regime, Phys. Rev. X11, 021002 (2021)
work page 2021
-
[54]
P. J. D. Crowley, C. R. Laumann, and S. Gopalakrishnan, Quantum criticality in ising chains with random hyper- uniform couplings, Phys. Rev. B100, 134206 (2019)
work page 2019
-
[55]
Z. D. Shi, V. Khemani, R. Vasseur, and S. Gopalakrish- nan, Many-body localization transition with correlated disorder, Phys. Rev. B106, 144201 (2022)
work page 2022
-
[56]
J. F. Karcher, S. Gopalakrishnan, and M. C. Rechtsman, Effect of hyperuniform disorder on band gaps, Phys. Rev. B110, 174205 (2024)
work page 2024
-
[57]
M. Barsukova, Z. Zhang, B. Gould, K. Sadri, C. Rosiek, S. Stobbe, J. Karcher, and M. C. Rechtsman, Stealthy- hyperuniform wave dynamics in two-dimensional pho- tonic crystals, arXiv preprint arXiv:2507.05253 (2025)
-
[58]
F. J. Wegner, Electrons in disordered systems. scaling near the mobility edge, Zeitschrift f¨ ur Physik B Con- densed Matter25, 327 (1976)
work page 1976
-
[59]
The mean survival timeτcan be interpreted as the aver- age time between two scattering events of the quantum particle on the disordered potential
-
[60]
A. Fetter and J. D. Walecka,Quantum Theory of Many- Particle Systems(Dover Publications, 2003)
work page 2003
-
[61]
E. Akkermans and G. Montambaux,Mesoscopic Physics of Electrons and Photons(Cambridge University Press, 2007)
work page 2007
-
[62]
Sometimes in the many-body quantum physics literature Σ(k, E) is referred to as theproperself-energy, to distin- 9 guish it from the self-energy diagrams including contri- butions that are one-particle reducible. We will not make this distinction here, as all the relations we will need only include the proper self-energy
-
[63]
I. F. Herbut, Comment on ”localization and the mobility edge in one-dimensional potentials with correlated disor- der” (2000), arXiv:cond-mat/0007266 [cond-mat.dis-nn]
work page internal anchor Pith review Pith/arXiv arXiv 2000
-
[64]
D. C. Licciardello and D. J. Thouless, Conductivity and mobility edges for two-dimensional disordered systems, Journal of Physics C: Solid State Physics8, 4157 (1975)
work page 1975
-
[65]
Perturbation theory approaches to Anderson and Many-Body Localization: some lecture notes
A. Scardicchio and T. Thiery, Perturbation theory ap- proaches to anderson and many-body localization: some lecture notes (2017), arXiv:1710.01234 [cond-mat.dis-nn]
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[66]
F. J. Dyson, Divergence of perturbation theory in quan- tum electrodynamics, Phys. Rev.85, 631 (1952)
work page 1952
-
[67]
J. T. Chalker, V. E. Kravtsov, and I. V. Lerner, Spec- tral rigidity and eigenfunction correlations at the ander- son transition, Journal of Experimental and Theoretical Physics Letters64, 386–392 (1996)
work page 1996
-
[68]
E. Bogomolny and O. Giraud, Eigenfunction entropy and spectral compressibility for critical random matrix en- sembles, Phys. Rev. Lett.106, 044101 (2011)
work page 2011
-
[69]
A. Kutlin and C. Vanoni, Investigating finite-size ef- fects in random matrices by counting resonances, SciPost Phys.18, 090 (2025)
work page 2025
- [70]
-
[71]
T. Schwartz, G. Bartal, S. Fishman, and M. Segev, Transport and anderson localization in disordered two- dimensional photonic lattices, Nature446, 52 (2007)
work page 2007
- [72]
-
[73]
M. Schreiber, S. S. Hodgman, P. Bordia, H. P. L¨ uschen, M. H. Fischer, R. Vosk, E. Altman, U. Schneider, and I. Bloch, Observation of many- body localization of interacting fermions in a quasir- andom optical lattice, Science349, 842 (2015), https://www.science.org/doi/pdf/10.1126/science.aaa7432
-
[74]
J. Smith, A. Lee, P. Richerme, B. Neyenhuis, P. W. Hess, P. Hauke, M. Heyl, D. A. Huse, and C. Mon- roe, Many-body localization in a quantum simulator with programmable random disorder, Nature Physics12, 907 (2016). 10 — SUPPLEMENTAL MATERIAL — A. Stealthy non-hyperuniform potentials In the main text, we discussed in detail the perturbation theory calcula...
work page 2016
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