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The European Physical Journal D

Entanglement of a multi-photon three-level atom interacting with a single-mode field in the presence of nonlinearities

A.‐S. F. Obada, Sadek Ahmed Hanoura, A. A. Eied

Published Aug 1, 2012• 14 citations
Publisher
DOI
10.1140/epjd/e2012-20658-7

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The interaction of a three-level atom in the V -configuration with a single-mode field under the mechanism of a multi-photon transition is studied. Influences of different possible choices of the atomic initial state, the mean photon number, the nonlinearity of the Kerr-like medium and the detuning parameters within various forms of the intensity-dependent atom–field couplings on the von Neumann entropy are analyzed. Simple analytical expressions of the unitary time evolution and density operators in the context of the framework of the dressed states are derived. General conclusions reached are illustrated by numerical results.
We study the interaction of a multi-photon three-level atom with a single mode field in a cavity, taking explicitly into account the existence of forms of nonlinearities of both the field and the intensity-dependent atom-field coupling. The analytical forms of the emission spectrum is calculated using the dressed states of the system. The effects of photon multiplicities, mean photon number, detuning, Kerr-like medium and the intensity-dependent coupling functional on the emission spectrum are analyzed.