Decoherence of an atomic condensate in a double-well trap at optical probing

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• 作者：L. V. Il’ichev ; P. L. Chapovskii
• 刊名：JETP Letters
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：102
• 期：1
• 页码：14-18
• 全文大小：262 KB
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• 作者单位：L. V. Il’ichev (1) (2)
  P. L. Chapovskii (1) (2)
  
  1. Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Universitetskii pr. 1, Novosibirsk, 630090, Russia
  2. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Atoms, Molecules, Clusters and Plasmas
  Solid State Physics and Spectroscopy
  Russian Library of Science
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6487

文摘

A model of an atomic condensate in a double-well potential with the possibility of tunneling between wells has been considered. The process of tunneling is modified by the optical probing of one of the wells by a beam of nonresonance radiation. The phase of the passing beam is correlated with the number of atoms in the probed well; as a result, coherence between states with different numbers of atoms is partially destroyed. The solution of the initial quantum kinetic equation for the states of the condensate has been obtained under the assumption of the dominant role of such a decoherence. An expression has been obtained for the correlation function of the amplitude of radiation passing through the probed well. The opposite situation of a slow destruction of coherence as compared to the rate of tunneling has also been considered. The stationary distribution in the numbers of atoms in wells for a given number of atoms in the condensate is uniform in both cases. Original Russian Text ? L.V. Il’ichev, P.L. Chapovskii, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 102, No. 1, pp. 18-2.