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Entropy and Entanglement of the Electromagnetically Induced Transparency System |
| LIU Xiao-Juan1,2,3;FANG Mao-Fa1,2;ZHOU Qing-Ping1,2 |
| 1Department of Physics, Human Normal University, Changsha 410081
2Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031
3Department of Physics, Hunan University of Science and Technology, Xiangtan 411201 |
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| Cite this article: |
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LIU Xiao-Juan, FANG Mao-Fa, ZHOU Qing-Ping 2004 Chin. Phys. Lett. 21 1071-1074 |
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Abstract We study the entropy and the entanglement of an electromagnetically induced transparency system. The quantum entanglement between the atom and the two quantized laser fields is discussed by using quantum reduced entropy and that between the two quantized laser fields by using quantum relative entropy. We also examine whether influences of EIT on entropy and quantum entanglement of the system considered occur or not. Our results show that the minimum value of the atomic reduced entropy may be regarded as an entropy criterion on the electromagnetically induced transparency occurring.
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42.50.Dv
42.50.Gy
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Published: 01 June 2004
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| PACS: |
42.50.Dv
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(Quantum state engineering and measurements)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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