Overlaps with arbitrary two-site states in the XXZ spin chain [PDF]
, 2018 We present a conjectured exact formula for overlaps between the Bethe states of the spin-1/2 XXZ chain and generic two-site states. The result takes the same form as in the previously known cases: it involves the same ratio of two Gaudin-like ...
Pozsgay, B.
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Failure of the Generalized Eigenstate Thermalization Hypothesis in integrable models with multiple particle species [PDF]
, 2014 It has been recently observed for a particular quantum quench in the XXZ spin chain that local observables do not equilibrate to the predictions of the Generalized Gibbs Ensemble (GGE).
Pozsgay, B.
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Generalized Gibbs Ensemble for Heisenberg Spin Chains [PDF]
, 2013 We consider the Generalized Gibbs Ensemble (GGE) in the context of global quantum quenches in XXZ Heisenberg spin chains. Embedding the GGE into the Quantum Transfer Matrix formalism we develop an iterative procedure to fix the Lagrange-multipliers and ...
Pozsgay, Balázs
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Partial breakdown of quantum thermalization in a Hubbard-like model [PDF]
, 2017 We study the possible breakdown of quantum thermalization in a model of itinerant electrons on a one-dimensional chain without disorder, with both spin and charge degrees of freedom.
Fisher, Matthew P. A. +2 more
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Excited state correlations of the finite Heisenberg chain [PDF]
, 2016 We consider short range correlations in excited states of the finite XXZ and XXX Heisenberg spin chains. We conjecture that the known results for the factorized ground state correlations can be applied to the excited states too, if the so-called physical
Pozsgay, B.
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Full Counting Statistics of Charge in Chaotic Many-body Quantum Systems
, 2023 We investigate the full counting statistics of charge transport in $U(1)$-symmetric random unitary circuits. We consider an initial mixed state prepared with a chemical potential imbalance between the left and right halves of the system, and study the ...
De Nardis, Jacopo +3 more
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On thermalization in the SYK and supersymmetric SYK models [PDF]
, 2018 The eigenstate thermalization hypothesis is a compelling conjecture which strives to explain the apparent thermal behavior of generic observables in closed quantum systems.
Hunter-Jones, Nicholas +2 more
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Real-time dynamics in a strongly interacting bosonic hopping model: Global quenches and mapping to the XX chain [PDF]
, 2016 We study the time evolution of an integrable many-particle system, described by the $q$-boson Hamiltonian in the limit of strong interactions $q\to\infty$.
Eisler, Viktor, Pozsgay, Balazs
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Quenching the XXZ spin chain: quench action approach versus generalized Gibbs ensemble
, 2014 Following our previous work [PRL 113 (2014) 09020] we present here a detailed comparison of the quench action approach and the predictions of the generalized Gibbs ensemble, with the result that while the quench action formalism correctly captures the ...
Mestyan, M. +3 more
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Constructing Auxiliary Dynamics for Nonequilibrium Stationary States by Variance Minimization [PDF]
, 2019 We present a strategy to construct guiding distribution functions (GDFs) based on variance minimization. Auxiliary dynamics via GDFs mitigates the exponential growth of variance as a function of bias in Monte Carlo estimators of large deviation functions.
Chan, Garnet Kin-Lic, Ray, Ushnish
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