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Сжатие света в двухатомной модели Джейнса-Каммингса с невырожденными двухфотонными переходами

Eugene K. Bashkirov, Липатова Светлана Петровна

Published Jan 1, 2009• 0 citations
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Abstract

The light squeezing for two two-level atom interacting with coherent field in ideal cavity via degenerate two-photon transitions has been investigated. The computer modeling of the squeezing parameter revealed that degenerate two-photon process is of great efficiency than that from one-photon process.

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Acta Physica Sinica•Jan 1, 1992•0 citations
An exact solution of the problem of two two level atoms with degenerate two photon transitions interacting with one mode coherent radiation field is presented. Asymptotic solutions for system state vectors are obtained in the approximation of large initial coherent fields. The atom field entanglement is investigated on the basis of the reduced atomic entropy dynamics. The possibility of the system being initially in a pure disentangled state to revive into this state during the evolution process for model considered is shown. Conditions and times of disentanglement are derived.
Two level atoms are injected into ideal cavity one by one to interact with the light field therein which intially is in coherent state. In one-photon transition case, the quadrature variance could be reduced by this means for suitably chosen interaction time t. But there exists some limitation, the squeezing will become worse if the number of times K is too large. In twophoton transition case, for large mean photon tumber N and optimum interaction time t = π/ g2, analytical formula for dependence of quadrature variance on N and K can be obtained. This formula shows that deep squeezing can be achieved by suitably chosen K. And the larger the N is, the stronger the achievable squeezing will be.
Two level atoms are injected into ideal cavity one by one to interact with the light field therein which intially is in coherent state. In one-photon transition case, the quadrature variance could be reduced by this means for suitably chosen interaction time t. But there exists some limitation, the squeezing will become worse if the number of times K is too large. In twophoton transition case, for large mean photon tumber N and optimum interaction time t = π/ g2, analytical formula for dependence of quadrature variance on N and K can be obtained. This formula shows that deep squeezing can be achieved by suitably chosen K. And the larger the N is, the stronger the achievable squeezing will be.