Related papers: Multiparticle Entanglement Dynamics of Quantum Chaos in a Bose-Einstein condensate

Multiparticle Entanglement Dynamics of Quantum Chaos in a Bose-Einstein condensate

URL: http://arxiv.org/abs/2012.12429v2
Date: Thu, 13 May 2021 07:02:57 GMT
Title: Multiparticle Entanglement Dynamics of Quantum Chaos in a Bose-Einstein condensate
Authors: Sheng-Chang Li, Luca Pezz\`e, and Augusto Smerzi
Abstract summary: We study the particle-entanglement dynamics witnessed by the quantum Fisher information (QFI) of a trapped Bose-Einstein condensate governed by the kicked rotor Hamiltonian.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We study the particle-entanglement dynamics witnessed by the quantum Fisher information (QFI) of a trapped Bose-Einstein condensate governed by the kicked rotor Hamiltonian. The dynamics is investigated with a beyond mean-field approach. We link the time scales of the validity of this approximation in, both, classical regular and chaotic regions, with the maximum Lyapunov exponents of the classical system. This establishes an effective connection between the classical chaos and the QFI. We finally study the critical point of a quantum phase transition using the beyond mean-field approximation by considering a two-mode bosonic Josephson junction with attractive interparticle interaction.

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