Entropy squeezing for a two-level atom in two-mode Raman coupled model with intrinsic decoherence |
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Authors: | Zhang Jian Shao Bin and Zou Jian |
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Affiliation: | Department of Physics, School of Science, Beijing Institute
of
Technology, Beijing 100081, China |
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Abstract: | In this paper, we investigate the entropy squeezing for a two-level
atom interacting with two quantized fields through Raman coupling.
We obtain the dynamical evolution of the total system under the
influence of intrinsic decoherence when the two quantized fields are
prepared in a two-mode squeezing vacuum state initially. The effects
of the field squeezing factor, the two-level atomic transition
frequency, the second field frequency and the intrinsic decoherence
on the entropy squeezing are discussed. Without intrinsic
decoherence, the increase of field squeezing factor can break the
entropy squeezing. The two-level atomic transition frequency changes
only the period of oscillation but not the strength of entropy
squeezing. The influence of the second field frequency is
complicated. With the intrinsic decoherence taken into
consideration, the results show that the stronger the intrinsic
decoherence is, the more quickly the entropy squeezing will
disappear. The increase of the atomic transition frequency can
hasten the disappearance of entropy squeezing. |
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Keywords: | entropy squeezing intrinsic
decoherence two-mode Raman coupled model |
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