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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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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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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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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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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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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Machine learning, quantum chaos, and pseudorandom evolution
, 2020 By modeling quantum chaotic dynamics with ensembles of random operators, we explore howmachine learning learning algorithms can be used to detect pseudorandom behavior in qubit systems.We analyze samples consisting of pieces of correlation functions and ...
Alves, Daniel W. F., Flynn, Michael O.
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, 2009 In this manuscript we give thought to the aftermath on the stable probability density function when standard multiplicative cascades are generalised cascades based on the $q$-product of Borges that emerged in the context of non-extensive statistical ...
Queiros, Silvio M. Duarte
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Detecting signals of weakly first-order phase transitions in two-dimensional Potts models [PDF]
, 2019 We investigate the first-order phase transitions of the $q$-state Potts models with $q = 5, 6, 7$, and $8$ on the two-dimensional square lattice, using Monte Carlo simulations.
Iino, Shumpei +3 more
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