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Quantum Electronics and Laser Science Conference

Mesoscopic entanglement of atomic ensembles through non-resonant stimulated Raman scattering

Wenhai Ji, Chunbai Wu, S. J. van Enk, Michael G. Raymer

Published May 1, 2007• 1 citation
Publisher

Abstract

Atomic ensemble entanglement can be generated by measuring the Stokes fields and verified hy measuring thc readout anti-Stokes fields. We model the effects of practical factors and find achievable entanglement regimes at mesoscopic-level excitation.
DOI
10.1109/qels.2007.4431218

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A proposal is made for the creation of macroscopic quantum states of collective atomic-ensemble variables by the use of stimulated Raman scattering (SRS), followed by conditional optical measurement. After the completion of the SRS process, one is able to reverse the process and to return all the atoms to their ground states in such a way that reads out an arbitrary quantum state of the collective atomic field and writes this state onto the outgoing optical field. This scheme can be used for the creation of entanglement between two distant atomic ensembles. The quantum analysis of the SRS process treats one-dimensional spatial-temporal propagation accurately. Remarkably, it is found that this multimode problem can be simplified to a two-mode problem involving spatial-temporal wave-packet modes of the optical and atomic collective fields. This improves the understanding of the entanglement created in this system.
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