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Journal of Hefei University of Technology

Quantum properties of the light field of two atoms in Bell states in a cavity

Zhang Sui-meng

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

Presented in the paper is the time evolution of the squeezing and second-order coherence properties of the light field in the system of two-level entangled atoms in Bell states interacting resonantly with a single-mode cavity field in the Fock state.According to the characterizations,Bell states composed of two identical atoms can be partially distinguished.

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•Jan 1, 2005•0 citations
Presented in the paper is the time evolution of the squeezing and second-order coherence properties of the light field in the system of two-level entangled atoms in Bell states interacting resonantly with a single-mode cavity field in the Fock state.According to the characterizations,Bell states composed of two identical atoms can be partially distinguished.
By means of time evolution operator, the emission spectrum from two two level entangled atoms in Bell states interacting with a single mode cavity field in the Fock state has been studied in the paper. The physical spectrum expression of radiation emitted by the atoms is given out for each Bell state. In general, the spectrum shows the symmetrical multi peak structure and the symmetrical three peak structure with the strong optical input. Bell states composed of two identical atoms can be partially distinguished in view of the characterizations of their emission spectrum
The light squeezing effects in the system of two identical two-level atoms in the Bell state interacting with the two-mode entangled coherent states field are investigated by means of Schrdinger equation solution and numerical calculations.The results show that light squeezing effects not only depends on the mean photon numbers and atomic initial state but also the degree of entanglement of the two-mode entangled coherent state optics field,whereas the coupling between two atoms does not affect the light squeezing effects.The light squeezing effects does not appear for a special kind of Bell state |β11〉,however there can appear the light squeezing effects under some conditions for the other three Bell states.