We study the propagation of entanglement after quantum quenches in the nonintegrable paramagnetic quantum Ising spin chain. Tuning the parameters of the system, we observe a sudden increase in the entanglement production rate, which we show to be related to the appearance of new quasiparticle excitations in the postquench spectrum. We argue that the phenomenon is the nonequilibrium version of the well-known Gibbs paradox related to mixing entropy and demonstrate that its characteristics fit the expectations derived from the quantum resolution of the paradox in systems with a nontrivial quasiparticle spectrum.

Dynamical manifestation of the Gibbs paradox after a quantum quench / Collura, M.; Kormos, M.; Takács, G.. - In: PHYSICAL REVIEW. A. - ISSN 2469-9934. - 98:5(2018), pp. 1-12. [10.1103/PhysRevA.98.053610]

Dynamical manifestation of the Gibbs paradox after a quantum quench

Collura, M.;Kormos, M.;Takács, G.
2018

Abstract

We study the propagation of entanglement after quantum quenches in the nonintegrable paramagnetic quantum Ising spin chain. Tuning the parameters of the system, we observe a sudden increase in the entanglement production rate, which we show to be related to the appearance of new quasiparticle excitations in the postquench spectrum. We argue that the phenomenon is the nonequilibrium version of the well-known Gibbs paradox related to mixing entropy and demonstrate that its characteristics fit the expectations derived from the quantum resolution of the paradox in systems with a nontrivial quasiparticle spectrum.
98
5
1
12
053610
https://arxiv.org/abs/1801.05817
Collura, M.; Kormos, M.; Takács, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/103454
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