科研之友
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摘要
By introducing the thermo-entangled state representation, we convert the calculation of Wigner WF) of density operator to an overlap between 'two pure' states in a two-mode enlarged Fock space. Furthermore, we derive a new WF evolution formula of any initial state in a self-Kerr medium with photon loss and find that the photon number distribution for any initial state is independent of the coupling factor with the Kerr medium, where the number state is not affected by the Kerr nonlinearity and evolves into a density operator of binomial distribution.
- 出版日期2011-5-13
- 单位江西师范大学
