A simple scheme for implementing four-atom quantum dense coding in cavity QED |
| |
Authors: | Zheng Xiao-Juan Xu Hui Fang Mao-Fa and Zhu Kai-Cheng |
| |
Institution: | School of Material Science and Engineering, Central South University, Changsha 410083, China; School of Physics Science and Technology, Central South University, Changsha 410083, China; School of Physics Science and Technology, Central South University, Changsha 410083, China |
| |
Abstract: | An experimentally feasible scheme for implementing
four-atom quantum dense coding of an atom--cavity system
is proposed. The cavity is only virtually excited and no quantum information will be
transferred from the atoms to the cavity. Thus the scheme is
insensitive to cavity decay and the thermal field. In the
scheme, Alice can send faithfully 4 bits of classical information to
Bob by sending two qubits. Generalized Bell states can be exactly
distinguished by detecting the atomic state, and quantum dense
coding can be realized in a simple way. |
| |
Keywords: | cavity quantum electrodynamics(QED) quantum dense
coding |
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 |
|