Preparation of steady-state entanglement via a laser-excited resonant interaction

doi:10.1088/1674-1056/21/8/084206

中国物理B ›› 2012, Vol. 21 ›› Issue (8): 84206-084206.doi: 10.1088/1674-1056/21/8/084206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Preparation of steady-state entanglement via a laser-excited resonant interaction

程广玲, 陈爱喜, 耿珺, 钟文学, 邓黎

Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China

收稿日期:2012-01-03 修回日期:2012-02-08 出版日期:2012-07-01 发布日期:2012-07-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11047182, 11165008, and 11065007), the Natural Science Foundation of Jiangxi Province, China (Grant Nos. 20114BAB202001 and 2010GQW0011), and the Science Foundation of East China Jiaotong University, China (Grant Nos. 10JC03 and 10JC06).

Preparation of steady-state entanglement via a laser-excited resonant interaction

Cheng Guang-Ling (程广玲), Chen Ai-Xi (陈爱喜), Geng Jun (耿珺), Zhong Wen-Xue (钟文学), Deng Li (邓黎)

Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China

Received:2012-01-03 Revised:2012-02-08 Online:2012-07-01 Published:2012-07-01
Contact: Chen Ai-Xi E-mail:aixichen@ecjtu.jx.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11047182, 11165008, and 11065007), the Natural Science Foundation of Jiangxi Province, China (Grant Nos. 20114BAB202001 and 2010GQW0011), and the Science Foundation of East China Jiaotong University, China (Grant Nos. 10JC03 and 10JC06).

摘要/Abstract

摘要： In this paper we propose a scheme, in which two-mode entanglement in a steady state is produced by using two lasers to resonantly drive a single four-level atom embedded inside a two-mode optical cavity. In this scheme, atomic coherence induced by a classical laser plays an important role in the process of preparing the entangled state. With the coupling of a strong control field, direct two-photon transition is generated and the relatively weak pump field induces the parametric interaction between two photons, which makes them entangled with each other. By numerical calculation, we find that the degree of entanglement depends strongly on the Rabi frequencies of the classical laser fields and the cavity losses.

关键词: two-mode entanglement, atomic coherence, resonant interaction

Abstract: In this paper we propose a scheme, in which two-mode entanglement in a steady state is produced by using two lasers to resonantly drive a single four-level atom embedded inside a two-mode optical cavity. In this scheme, atomic coherence induced by a classical laser plays an important role in the process of preparing the entangled state. With the coupling of a strong control field, direct two-photon transition is generated and the relatively weak pump field induces the parametric interaction between two photons, which makes them entangled with each other. By numerical calculation, we find that the degree of entanglement depends strongly on the Rabi frequencies of the classical laser fields and the cavity losses.

Key words: two-mode entanglement, atomic coherence, resonant interaction

中图分类号: (Quantum state engineering and measurements)

42.50.Dv

03.67.Mn (Entanglement measures, witnesses, and other characterizations) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

程广玲, 陈爱喜, 耿珺, 钟文学, 邓黎. Preparation of steady-state entanglement via a laser-excited resonant interaction[J]. 中国物理B, 2012, 21(8): 84206-084206.

Cheng Guang-Ling (程广玲), Chen Ai-Xi (陈爱喜), Geng Jun (耿珺), Zhong Wen-Xue (钟文学), Deng Li (邓黎). Preparation of steady-state entanglement via a laser-excited resonant interaction[J]. Chin. Phys. B, 2012, 21(8): 84206-084206.

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Preparation of steady-state entanglement via a laser-excited resonant interaction

Preparation of steady-state entanglement via a laser-excited resonant interaction

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