Quench dynamics of Rényi negativities and the quasiparticle picture
arXiv:2110.14589 · doi:10.1007/978-3-031-03998-0_14
Abstract
The study of the moments of the partially transposed density matrix provides a new and effective way of detecting bipartite entanglement in a many-body mixed state. This is valuable for cold-atom and ion-trap experiments, as well as in the general context of quantum simulation of many-body systems. In this work we study the time evolution after a quantum quench of the moments of the partial transpose, and several related quantities, such as the Rényi negativities. By combining Conformal Field Theory (CFT) results with integrability, we show that, in the space-time scaling limit of long times and large subsystems, a quasiparticle description allows for a complete understanding of the Rényi negativities. We test our analytical predictions against exact numerical results for free-fermion and free-boson lattice models, even though our framework applies to generic interacting integrable systems.
arXiv comment24 pages, 7 figures
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