The effect of environment induced pure decoherence on the generalized Jaynes-Cummings model |
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Authors: | Gautam Gangopadhyay S H Lin |
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Institution: | (1) S N Bose National Centre for Basic Sciences, JD Block, Sector III, 700 091 Salt Lake City, Calcutta, India;(2) Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei, Taiwan, 106, R.O.C |
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Abstract: | We have studied the effect of environment induced pure decoherence on the generalized Jaynes-Cummings model (JCM). This generalized
JCM is introduced to take into account both atom-field interaction and a class of spin-orbit interactions in the same framework.
For generalized JCM with atom-field interaction, it is shown that along with the suppression of the oscillatory behaviour
of the atomic and field variables, in the steady state, atomic energy is transferred to the field or vice versa through the
dressed state coherence depending on the initial condition of the atom-field system and the model under consideration. It
is also shown that initial Poissonian field acquires a sub-Poissonian character in the steady state and thus all the nonclassical
properties are not erased by the decoherence in JCM. An interesting effect of this decoherence mechanism is that it affects
the population and coherence properties of the individual subsystem in a different way. As an example of generalized JCM with
spin-orbit interaction, the dynamics of spin of the hydrogen atom in a magnetic field is studied to show the effect of decoherence. |
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Keywords: | Decoherence Jaynes-Cummings model generalized JCM |
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