Two-qubit entanglement dynamics in a symmetry-broken environment (8 pages)

A. B. Klimov, Isabel Sainz

Nikola Burić

Nikola Burić

Zeng-Zhao Li, Xian-Ting Liang, Xiao‐Yin Pan

Marco Lucamarini, Simone Paganelli, Stefano Mancini

We study the temporal evolution of entanglement pertaining to two qubits interacting with a thermal bath. In particular we consider the simplest nontrivial spin bath models where symmetry breaking occurs and treat them by mean field approximation. We analytically find decoherence free entangled states as well as entangled states with an exponential decay of the quantum correlation at finite temperature.

XIAO SAN MA, An Min Wang, Xiao Dong Yang +1 more

We study the entanglement dynamics of the three-qubit system in a symmetry-broken environment consisting of a fermionic bath. Decoherence induced by the bath is analysed. We find that the entanglement of states will decrease or remain unchanged under the system–bath interaction. The class of decoherence-free states of the three-qubit system of our model has been found out.