Non-Equilibrium Phase Transitions in Cooperative Atomic Systems
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概要
- 論文の詳細を見る
We consider N two level atoms driven far from equilibrium by a coherent driving field. The atoms may decay by a cooperative (J^2 preserving) mechanism or a non-cooperative (J^2 non-conserving) mechanism where J is the atmic pseudo angular momentum. We adopt a mean field theory to study the J^2 non-conserving interaction. This indicates that the system displays a first order phase transition in several observables, e. g., mean field, spectrum and photon statistics. The two stable branches of the hysteresis curve are shown to be regions of cooperative and non-cooperative behaviour respectively. In the case of cooperative atomic decays we find a solution to the Fokker-Planck equation in the atomic coherent state representation. This predicts a second order phase transition in atomic observables-a cooperative fluorescent critical point.
- 理論物理学刊行会の論文
- 1979-04-01
著者
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Walls D.
Physics Department University Of Waikato
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DRUMMOND P.
Physics Department, University of Waikato
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HASSAN S.
Physics Department, University of Waikato
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CARMICHAEL H.
Physics Department, University of Waikato
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Carmichael H.
Physics Department University Of Waikato : Physics Department City College City University Of New Yo
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Drummond P.
Physics Department University Of Waikato
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Hassan S.
Physics Department University Of Waikato : Ain Shams University : New Zealand U. G. C. Postdoctoral Fellow.
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HASSAN S.
Physics Department, University of Waikato : Ain Shams University : New Zealand U. G. C. Postdoctoral Fellow.
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CARMICHAEL H.
Physics Department, University of Waikato : Physics Department, City College, City University of New York