Contatto di riferimento: Barbara Simoni
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.