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Entropy Growth and Formation of Stationary Entanglement due to Intrinsic Noise in the Two-Mode JC Model |
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PP: 1-9 |
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Author(s) |
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H. A. Hessian,
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Abstract |
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| We investigate the dynamics of the two-mode Jaynes–Cummings model with generalized nonlinear coupling including
intrinsic noise as described by the Milburn equation. Based on a general analytic solution of the corresponding master equation, we
calculate the growth of entropy in the system at the special case of two Raman–coupled long lived atomic states as well as the partial
entropies of the atom and field subsystem.We see that the system is very sensitive to phase noise, if both fields are initially in a coherent
state. The dynamics then rapidly leads to suppression of quantum revivals and a steady entanglement between the fields and the atom.
This hints for serious limitations for the use of Raman induced transitions in quantum information processing setups. For an alternative
entanglement measure we calculate the negativity of the eigenvalues of the partially transposed density matrix and compare it to the
difference of the total entropy to the sum of field and atom partial entropies. |
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