Dynamical manifestation of the Gibbs paradox after a quantum quench
Mario ColluraThe Rudolf Peierls Centre for Theoretical Physics, Oxford University, Oxford OX1 3NP, United KingdomMárton KormosBME “Momentum” Statistical Field Theory Research Group, H-1117 Budapest, Budafoki út 8, HungaryG. TakácsBME Department of Theoretical Physics, H-1117 Budapest, Budafoki út 8, Hungary
2018en
ABI
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.
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Cited by 30 references