Journal
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
Volume 2022, Issue 8, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1742-5468/ac85eb
Keywords
entanglement entropies; quantum quenches; symmetries of integrable models; conformal field theory
Categories
Funding
- ERC [771536]
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The study investigates the non-equilibrium dynamics of symmetry-resolved Renyi entropies in a one-dimensional gas of non-interacting spinless fermions using quantum generalised hydrodynamics. The research shows an asymptotic logarithmic growth of charged moments at half system and an asymptotic restoration of equipartition of entropy among symmetry sectors with deviations proportional to the square of the inverse of the total entropy as time and the entangling position change.
We investigate the non-equilibrium dynamics of the symmetry-resolved Renyi entropies in a one-dimensional gas of non-interacting spinless fermions by means of quantum generalised hydrodynamics, which recently allowed to obtain very accurate results for the total entanglement in inhomogeneous quench settings. Although our discussion is valid for any quench setting accessible with quantum generalised hydrodynamics, we focus on the case of a quantum gas initially prepared in a bipartite fashion and subsequently let evolve unitarily with a hopping Hamiltonian. For this system, we characterise the symmetry-resolved Renyi entropies as function of time t and of the entangling position x along the inhomogeneous profile. We observe an asymptotic logarithmic growth of the charged moments at half system and an asymptotic restoration of equipartition of entropy among symmetry sectors with deviations which are proportional to the square of the inverse of the total entropy.
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