Entropy and entanglement in master equation of effective hamiltonian for jaynes-cummings model

H. A. Hessian, F. A. Mohammed, Abdelbaset Mohamed

Research output: Contribution to journalJournal articlepeer-review

1 Scopus citations

Abstract

In this paper, we analytically solve the master equation for Jaynes-Cummings model in the dispersive regime including phase damping and the field is assumed to be initially in a superposition of coherent states. Using an established entanglement measure based on the negativity of the eigenvalues of the partially transposed density matrix we find a very strong sensitivity of the maximally generated entanglement to the amount of phase damping. Qualitatively this behavior is also reflected in alternative entanglement measures, but the quantitative agreement between different measures depends on the chosen noise model. The phase decoherence for this model results in monotonic increase in the total entropy while the atomic sub-entropy keeps its periodic behaviour without any effect.

Original languageEnglish
Pages (from-to)723-728
Number of pages6
JournalCommunications in Theoretical Physics
Volume51
Issue number4
DOIs
StatePublished - 2009
Externally publishedYes

Keywords

  • Entanglement
  • Master equation
  • Phase damping
  • Superposition state

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