Dynamical manifestation of Gibbs paradox after a quantum quench

  • Data: 22 marzo 2018 dalle 16:00 alle 17:00

  • Luogo: Aula Teorici, via Irnerio 46, Bologna

Contatto di riferimento:

Partecipanti: Prof. Gabor Takacs: Eötvös University, Budapest

Abstract: We study the propagation of entanglement after quantum quenches in the non-integrable para-magnetic 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 quasi-particle excitations in the post-quench spectrum.

We argue that the phenomenon is the non-equilibrium 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 non-trivial quasi-particle spectrum.