Sublattice symmetry in any 1D quadratic bosonic pairing Hamiltonian automatically implies an effective time-reversal symmetry of the dynamical matrix, enabling a symmetry-protected skin effect distinct from quadrature decoupling.
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Ashida , author Z
25 Pith papers cite this work, alongside 1,657 external citations. Polarity classification is still indexing.
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B-VQE is a biorthogonal variational quantum eigensolver with exceptional-point detection and importance sampling that simulates non-Hermitian many-body models on NISQ hardware with reported energy errors below 5e-3.
Dynamical poles from Green's function analytic continuation, rather than static bound states, control late-time dynamics in non-Hermitian impurity scattering.
Skin effects in non-Hermitian Luttinger liquids fractionalize by symmetry, producing decoupled spin and charge skin modes at low energies plus an interaction-enabled E8 skin effect absent in free fermions.
Fractional winding numbers in open quantum systems recover integer quantization over multiple momentum periods.
Algebraic states in continuum (AICs) with 1/|r| decay exist inside the bulk continuum of 2D non-Hermitian systems with one impurity, with an analytically derived threshold condition, and are absent in Hermitian or 1D non-Hermitian cases.
Derives semiclassical orbital magnetization energy in non-Hermitian periodic systems and defines a non-Hermitian angular momentum operator compatible with the real part of the orbital magnetic moment, with imaginary part linked to a generalized Aharonov-Bohm effect.
Effective gain engineered through evaporative cooling of thermal atoms enables Bose-Einstein condensation in a topological edge state of a synthetic hyperfine SSH lattice, realizing a topological atom laser.
Phase diagrams and correlation asymptotics of two non-Hermitian XY chains depend on both the expectation-value formalism and the chosen eigenstate, favoring standard quantum mechanics.
Non-Hermitian XY model provides first spin-based realization of an idle-level quantum Otto engine where non-Hermiticity compresses the idle gap to improve work and efficiency.
A frustrated Vicsek–Kuramoto particle model yields a non-Hermitian hydrodynamic spectrum with Chern numbers C=±2 whose strip spectral flow predicts the observed chiral boundary flow.
NMR data show singular low-energy spin fluctuations in the strange-metal phase of La2-xSrxCuO4 at x=0.25 that increase down to lowest temperatures, extending beyond the stripe critical point at x=0.19 and linked to spatial inhomogeneity.
In a minimal model of partially pumped atomic ensembles, collective dissipation induces interference that allows tuning linewidth from size-independent to extensive and photon statistics from antibunched to bunched via phase and pump rate.
The Gamow shell model locates a double pole S-matrix singularity (exceptional point) for the 5/2^- resonances in 7Be, shown by coalescing wave functions, spectral functions, and singular spectroscopic factors plus electromagnetic transitions.
Broad regions of horizontal and vertical spin stripes appear at low temperature in the Hubbard model, with wavelengths that vary nonlinearly with hole doping and are highly sensitive to the ratio of nearest- and next-nearest-neighbor hoppings.
In a monitored Rashba chain the disconnected entanglement entropy stays topological for a time linear in system size because monitoring switches between degenerate topological states while poisoning other quasiparticles.
Long-range non-Hermitian XX spin chains show enhanced time and size scaling of dynamical quantum Fisher information for parameter estimation compared to short-range and Hermitian cases, with identical scaling at criticality for ground-state probes.
Nematic order competes with d-wave superconductivity via a first-order transition but coexists with s-wave pairing in a 2D electron gas with quadrupolar interactions, producing mixed phases at finite temperature.
Gradient-descent optimization of eight circuit parameters in a Strawberry Fields model yields CFI gains of 153% to 1775% and 8x to 133x more useful events per pulse versus Afek et al. (2010) for N=2-5, reaching 82% of Heisenberg limit at N=2 and 58% at N=5.
Establishes correspondence between equilibrium Majorana zero modes and non-equilibrium kinetic zero modes in dissipative topological superconductors, derives algebraic relation for their numbers, and proposes dissipation engineering recipes demonstrated on Kitaev chain.
The Lindblad equation is valid only within a finite time window controlled by the timescales of the bath, the system, and the rotating-wave approximation, with failure at early and late times.
Coupling a skin-localized non-Hermitian chain to a delocalized chain induces a pseudo mobility edge in complex energy that separates localized and extended states, with a quantized winding number characterizing transitions under mixed boundary conditions.
Analytical solutions for displaced Gaussian states in driven damped oscillators show dynamics independent of bath temperature, unaffected by fast-rotating modes, and sharing exceptional point structure with the undriven case, valid also for time-dependent drives.
Non-Hermitian systems admit equivalent descriptions in isomorphic Hilbert spaces related by Krein metrics, with physical quantities transported accordingly; illustrated on a two-level spin model via Robertson uncertainty relation as consistency test.
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Symmetry as a route to generalized bosonic Kitaev chains
Sublattice symmetry in any 1D quadratic bosonic pairing Hamiltonian automatically implies an effective time-reversal symmetry of the dynamical matrix, enabling a symmetry-protected skin effect distinct from quadrature decoupling.
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Exceptional-Point-Anchored Variational Quantum Eigensolver for Non-Hermitian Many-Body Phase Diagrams: Bridging Skin-Effect Topology and Entanglement Criticality on NISQ Hardware
B-VQE is a biorthogonal variational quantum eigensolver with exceptional-point detection and importance sampling that simulates non-Hermitian many-body models on NISQ hardware with reported energy errors below 5e-3.
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Dynamical Poles in Non-Hermitian Impurity Scattering
Dynamical poles from Green's function analytic continuation, rather than static bound states, control late-time dynamics in non-Hermitian impurity scattering.
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Symmetry-Fractionalized Skin Effects in Non-Hermitian Luttinger Liquids
Skin effects in non-Hermitian Luttinger liquids fractionalize by symmetry, producing decoupled spin and charge skin modes at low energies plus an interaction-enabled E8 skin effect absent in free fermions.
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Fractional topology and multi-period re-quantization in open quantum systems
Fractional winding numbers in open quantum systems recover integer quantization over multiple momentum periods.
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Algebraic States in Continuum in $ d\gt 1$ Dimensional Non-Hermitian Systems
Algebraic states in continuum (AICs) with 1/|r| decay exist inside the bulk continuum of 2D non-Hermitian systems with one impurity, with an analytically derived threshold condition, and are absent in Hermitian or 1D non-Hermitian cases.
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Non-Hermitian magnetic moment
Derives semiclassical orbital magnetization energy in non-Hermitian periodic systems and defines a non-Hermitian angular momentum operator compatible with the real part of the orbital magnetic moment, with imaginary part linked to a generalized Aharonov-Bohm effect.
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Gain engineering and atom lasing in a topological edge state in synthetic dimensions
Effective gain engineered through evaporative cooling of thermal atoms enables Bose-Einstein condensation in a topological edge state of a synthetic hyperfine SSH lattice, realizing a topological atom laser.
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Quantum critical properties of non-Hermitian XY models with magnetic field
Phase diagrams and correlation asymptotics of two non-Hermitian XY chains depend on both the expectation-value formalism and the chosen eigenstate, favoring standard quantum mechanics.
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Quantum Otto engine with field-decoupled idle levels in a non-Hermitian XY model
Non-Hermitian XY model provides first spin-based realization of an idle-level quantum Otto engine where non-Hermiticity compresses the idle gap to improve work and efficiency.
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A Minimal Active-Particle Realization of Non-Hermitian Chern Bulk-Boundary Correspondence
A frustrated Vicsek–Kuramoto particle model yields a non-Hermitian hydrodynamic spectrum with Chern numbers C=±2 whose strip spectral flow predicts the observed chiral boundary flow.
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Singular spin fluctuations in the strange-metal phase of La2-xSrxCuO4
NMR data show singular low-energy spin fluctuations in the strange-metal phase of La2-xSrxCuO4 at x=0.25 that increase down to lowest temperatures, extending beyond the stripe critical point at x=0.19 and linked to spatial inhomogeneity.
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One knob to tune them all: Phase-controlled photon statistics and linewidth in partially pumped atomic ensembles
In a minimal model of partially pumped atomic ensembles, collective dissipation induces interference that allows tuning linewidth from size-independent to extensive and photon statistics from antibunched to bunched via phase and pump rate.
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Double pole $S$-matrix singularity in the continuum of $^7$Be
The Gamow shell model locates a double pole S-matrix singularity (exceptional point) for the 5/2^- resonances in 7Be, shown by coalescing wave functions, spectral functions, and singular spectroscopic factors plus electromagnetic transitions.
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Spin-stripes in the Hubbard model: a combined DMFT and Bethe-Salpeter analysis
Broad regions of horizontal and vertical spin stripes appear at low temperature in the Hubbard model, with wavelengths that vary nonlinearly with hole doping and are highly sensitive to the ratio of nearest- and next-nearest-neighbor hoppings.
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Long-lasting Topological Entanglement in a Monitored Rashba Nanowire
In a monitored Rashba chain the disconnected entanglement entropy stays topological for a time linear in system size because monitoring switches between degenerate topological states while poisoning other quasiparticles.
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Quantum-enhanced sensing from the interplay of long-range interactions and non-Hermiticity
Long-range non-Hermitian XX spin chains show enhanced time and size scaling of dynamical quantum Fisher information for parameter estimation compared to short-range and Hermitian cases, with identical scaling at criticality for ground-state probes.
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Competition and coexistence of superconductivity and nematic order in a two-dimensional electron gas with quadrupolar interactions
Nematic order competes with d-wave superconductivity via a first-order transition but coexists with s-wave pairing in a 2D electron gas with quadrupolar interactions, producing mixed phases at finite temperature.
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Quantum-Enhanced Single-Parameter Phase Estimation with Adaptive NOON States
Gradient-descent optimization of eight circuit parameters in a Strawberry Fields model yields CFI gains of 153% to 1775% and 8x to 133x more useful events per pulse versus Afek et al. (2010) for N=2-5, reaching 82% of Heisenberg limit at N=2 and 58% at N=5.
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Dissipation-Induced Steady States in Topological Superconductors: Mechanisms and Design Principles
Establishes correspondence between equilibrium Majorana zero modes and non-equilibrium kinetic zero modes in dissipative topological superconductors, derives algebraic relation for their numbers, and proposes dissipation engineering recipes demonstrated on Kitaev chain.
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Is Lindblad for me?
The Lindblad equation is valid only within a finite time window controlled by the timescales of the bath, the system, and the rotating-wave approximation, with failure at early and late times.
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Non-Hermitian pseudo mobility edge in a coupled chain system
Coupling a skin-localized non-Hermitian chain to a delocalized chain induces a pseudo mobility edge in complex energy that separates localized and extended states, with a quantized winding number characterizing transitions under mixed boundary conditions.
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Evolution of Gaussian mixed states under the Markovian master equation for a driven quantum oscillator
Analytical solutions for displaced Gaussian states in driven damped oscillators show dynamics independent of bath temperature, unaffected by fast-rotating modes, and sharing exceptional point structure with the undriven case, valid also for time-dependent drives.
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Metric Congruence in Finite-Dimensional Non-Hermitian Quantum Mechanics
Non-Hermitian systems admit equivalent descriptions in isomorphic Hilbert spaces related by Krein metrics, with physical quantities transported accordingly; illustrated on a two-level spin model via Robertson uncertainty relation as consistency test.
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Krylov Complexity
Krylov complexity is a canonical, parameter-independent measure of operator spreading that probes chaotic dynamics to late times and admits a geometric interpretation in holographic duals.