Effect of double local quenches on Loschmidt echo and entanglement entropy of a one-dimensional quantum system

Abstract

We study the effect of two simultaneous local quenches on the evolution of Loschmidt echo and entanglement entropy of a one dimensional transverse Ising model. In this work, one of the local quenches involves the connection of two spin-1/2 chains at a certain time and the other local quench corresponds to a sudden change in the magnitude of the transverse field at a given site in one of the spin chains. We numerically calculate the dynamics associated with the Loschmidt echo and the entanglement entropy as a result of such double quenches, and discuss various timescales involved in this problem using the picture of quasiparticles generated as a result of such quenches.

11 pages, 10 figures

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Cited by in corpus (4)

• Growth of mutual information in a quenched one-dimensional open quantum many body system
• Spinon and bound state excitation "light cones" in Heisenberg XXZ Chains
• Dynamics of decoherence of an entangled pair of qubits locally connected to a one-dimensional disordered spin chain
• Entanglement entropy of a three-spin interacting spin chain with a time-reversal breaking impurity at one boundary