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Journal of Huaihua University

A Scheme for Generation of Multi-Atom Entangled W State in Cavity QED

Hong‐Mei Zou

Published Jan 1, 2010• 0 citations
OpenAlex

Abstract

This article discusses an alternative scheme to generate a multi-atom entangled W state in cavity QED via Raman transitions.The present scheme does not involve cavity-photon population during the operation and thus is insensitive to the cavity decay.On the other hand,we have also indicated that the scheme is easy to implement from the experimental point of view.

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Communications in Theoretical Physics•Apr 1, 2007•0 citations
This article discusses an alternative scheme to generate a multi-atom entangled W state in cavity QED via Raman transitions.The present scheme does not involve cavity-photon population during the operation and thus is insensitive to the cavity decay.On the other hand,we have also indicated that the scheme is easy to implement from the experimental point of view.
A protocol is proposed to generate atomic entangled states in a cavity QED system. It utilizes Raman transitions or stimulated Raman adiabatic passages between two systems to entangle the ground states of two three-state ΛΛΛ-type atoms trapped in a single mode cavity. It does not need the measurements on cavity field nor atomic detection and can be implemented in a deterministic fashion. Since the present protocol is insensitive to both cavity decay and atomic spontaneous emission, the produced entangled states may have some interesting applications in quantum information processing.
A scheme is proposed for the generation of W entangled states for several atoms trapped in a cavity by detecting photon decay. The scheme works in the regime, where the cavity decay rate is larger than the atom-cavity coupling strength. Thus, the requirement for the quality factor of the cavity is greatly loosened, which is of importance in view of experiment. Another advantage of this scheme is that the atoms are always populated in two ground states coupled by Raman transitions, thus the spontaneous emission can also be suppressed.