Chinese Journal of Quantum Electronics, Volume. 24, Issue 4, 456(2007)
Coherence properties of radiation and absorption in the three-level atom
The interaction of the qubit with its environment induces the qubit dissipation or dephasing,which causes the qubit collapse from a coherent superposition state to a mixed or pure state. This process is known as quantum decoherence. The radiation and absorption of the three-level atom is studied. Basis on theories of quantum mechanics and Kraus operator and utilizing the reducible density rectangular method the transformation of density matrix of the three-level atom which simultaneously in the case of the radiation and absorption is investigated. The coherence properties of quantum states are also investigated. If the early state of the three-level atom is coherence state,it may evolve to the coherent state,the partial mixed state completely,the completely state,and the pure state.
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GAO Feng, ZHANG Deng-yu, TANG Mei-juan. Coherence properties of radiation and absorption in the three-level atom[J]. Chinese Journal of Quantum Electronics, 2007, 24(4): 456
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Received: Dec. 18, 2006
Accepted: --
Published Online: Jun. 7, 2010
The Author Email: Feng GAO (hygfeng@163.com)
CSTR:32186.14.