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IEEE International Workshop on Workload Characterization (WWC)

On preparation of the atomic W-states

В. Н. Горбачев, A. A. Rodichkina, Andrew I. Trubilko, A. I. Zhiliba

Published Apr 23, 2004• 0 citations
Publisher

Abstract

We analyse possibilities for quantum state engineering offered by the resonance Raman type interaction of light with ensembles of two-level atoms taking account relaxation to prepare and control of entangled states. It is found that atomic entanglement of the W-class can be obtained during evolution of atoms interacted with a single mode squeezed light. Two schemes, involving projection measurements that result in multipartite W-like states, are introduced.

DOI
10.1109/phycon.2003.1237014

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Multiparticle entangled states generated via interaction between narrowband light and an ensemble of identical two-level atoms are considered. Depending on the initial photon statistics, correlation between atoms and photons can give rise to entangled states of these systems. It is found that the state of any pair of atoms interacting with weak single-mode squeezed light is inseparable and robust against decay. Optical schemes for preparing entangled states of atomic ensembles by projective measurement are described.
A method is presented for generating highly squeezed states of a cavity field via the atom-cavity field interaction of the Raman type. In the scheme a sequence of three-level -type atoms interacts with a cavity field, displaced by a classical source, in a Raman manner. Then the atomic states are measured. By this way the cavity field may collapse onto a superposition of several coherent states, which exhibits strong squeezing. The scheme can also be used to prepare superpositions of many two-mode coherent states for two cavity fields. The coherent states in each mode are on a straight line. This is the first way for preparing multi-component entangled coherent states of this type in cavity QED.
A method is presented for generating highly squeezed states of a cavity field via the atom-cavity field interaction of the Raman type. In the scheme a sequence of three-level A-type atoms interacts with a cavity field, displaced by a classical source, in a Rarman manner. Then the atomic states are measured. By this way the cavity field may collapse onto a superposition of several coherent states, which exhibits strong squeezing. The scheme can also be used to prepare superpositions of many two-mode coherent states for two cavity fields. The coherent states in each mode are on a straight line. This is the first way for preparing multi-component entangled coherent states of this type in cavity QED.