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Quantum Optics Journal of the European Optical Society Part B

Phase properties of the field interacting with a three-level atom. I. One-mode case

E.I. Aliskenderov, Ho Trung Dung, A.S. Shumovsky

Published Oct 1, 1991• 10 citations
Publisher

Abstract

Phase properties of a one-mode coherent field interacting with a three-level atom under two-photon resonance are studied using the new phase formalism of Pegg and Barnett (1988). The connection between the collapse and revival phenomenon and dynamical properties of the field phase is found. Interesting features such as the partial trapping of the field phase in its initial state are discovered and discussed.

DOI
10.1088/0954-8998/3/5/001

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Phase properties of a one-mode coherent field interacting with a three-level atom under two-photon resonance are studied using the new phase formalism of Pegg and Barnett (1988). The connection between the collapse and revival phenomenon and dynamical properties of the field phase is found. Interesting features such as the partial trapping of the field phase in its initial state are discovered and discussed.
We investigate some of the fundamental features of the interaction of squeezed light with two-level atoms in the framework of the Jaynes-Cummings model. We start our analysis by calculating the collapses and revivals of the atomic inversion. We discuss the degree of purity of the field (given by the entropy) and its disentanglement from the atomic source. The connection with the evolution of the Q-function is also made. We notice that contrary to the coherent state case, the field turns into a nearly pure (squeezed) state at the revival time as if the field was prepared in a coherent state. The field also becomes a superposition of squeezed states at half of the revival time, and this is confirmed by investigating the photon number distribution. The phase properties of the field are discussed using the Pegg-Barnett formalism.