PMID: 14995850Mar 5, 2004Paper

Entanglement and the phase transition in single-mode superradiance

Physical Review Letters
Neill LambertTobias Brandes

Abstract

We consider the entanglement properties of the quantum phase transition in the single-mode superradiance model, involving the interaction of a boson mode and an ensemble of atoms. For an infinite size system, the atom-field entanglement diverges logarithmically with the correlation length exponent. Using a continuous variable representation, we compare this to the divergence of the entropy in conformal field theories and derive an exact expression for the scaled concurrence and the cusplike nonanalyticity of the momentum squeezing.

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Citations

Feb 16, 2011·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Barry M Garraway
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