Eur. Phys. J. D 37, 135-140 (2006)
https://doi.org/10.1140/epjd/e2005-00247-9

Multipartite entanglement dynamics and decoherence

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, P.R. China

Corresponding author: ^a anmwang@ustc.edu.cn

Received: 24 March 2005
Revised: 20 June 2005
Published online: 6 September 2005

Abstract

We study the dynamics of multipartite entanglement under decoherence induced by the environment consisting of a fermionic bath. Based on the algebraic measure of entanglement-negativity, we analyze the time evolution of entanglement of both pure states and mixed ones, and find that entanglement evolution depends on both bath temperature and the number of qubits of the system. A linear space S_LDF which is dynamically decoupled from the environment is identified in the sense of linear entropy to symbolize the environment effect.