Entanglement and the Phase Transition in Single Mode Superradiance

Details Entanglement and the Phase Transition in Single Mode Superradiance Entanglement and the Phase Transition in Single Mode Superradiance

2003-09-02

arxiv.org/abs/quant-ph/0309027v1

Phys.Rev.Lett.92:073602,2004

Physics

Quantum Physics

4 pages, 2 figues

Scientific paper

10.1103/PhysRevLett.92.073602

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 infinite system size, the atom-field entanglement of formation 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 cusp-like non-analyticity of the momentum squeezing.

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