Entanglement evolution of a two-qubit system with decay beyond the rotating-wave approximation |
| |
Authors: | Yang Qing Yang Ming Li Da-Chuang and Cao Zhuo-Liang |
| |
Institution: | Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics & Material Science, Anhui University, Hefei 230039, China; Department of Physics, Hefei Teachers College, Hefei 230061, China |
| |
Abstract: | The entanglement property of two identical atoms,
initially entangled in Bell states, coupled to a single-mode cavity
is considered. Based on the reduced non-perturbative quantum master
equation method, the entanglement evolution of the two atoms with
decay is investigated beyond the conventional rotating-wave
approximation. We show that the counter-rotating wave terms,
usually neglected, have a great influence on the disentanglement
behaviour of the system. The phenomena of entanglement sudden death
and entanglement sudden birth will occur. In addition, we show that
the entanglement can be strengthened by introducing the
dipole--dipole interaction of the two atoms. |
| |
Keywords: | quantum entanglement beyond rotating-wave approximation |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|