Dynamical manifestation of Gibbs paradox after a quantum quench

by Prof. Gabor Takacs (Eötvös University, Budapest)

Thursday 22 Mar 2018, 16:00 → 17:00 Europe/Rome

Aula Teorici (DIFA)

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.