Entanglement death and teleportation pre-emption in a dissipative system of two coupled qubits |
| |
Authors: | Chun-Xian Li Cheng-Zhi Wang Liu-Ying Nie Jiang-Fan Li |
| |
Affiliation: | Department of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China |
| |
Abstract: | We discuss the entanglement of two coupled qubits each of which is interacting with a multi-mode squeezed vacuum field reservoir and the possibility to use them in a teleportation protocol. The entanglement sudden death (ESD) and teleportation pre-emption (TPE) are discovered in this system. We consider the interplay between the coupling strength and the squeezing parameter, and find that they play competing roles in entanglement as well as in teleportation. We show in detail how the entanglement decay affects the teleportation. It is interesting to show that TPE precedes ESD in general, and for given measurement result and squeeze parameter all output states of teleportation for a long time arrive at a fixed asymptotic point in the Bloch sphere. |
| |
Keywords: | Entanglement sudden death Teleportation pre-emption Multi-mode squeezed vacuum field reservoir |
本文献已被 ScienceDirect 等数据库收录! |