BCS-like Modewise Entanglement of Fermion Gaussian States

Details BCS-like Modewise Entanglement of Fermion Gaussian States BCS-like Modewise Entanglement of Fermion Gaussian States

2004-04-30

arxiv.org/abs/quant-ph/0404176v3

Physics Letters A 331 (2004) 39-44

Physics

Quantum Physics

10 pages, RevTex4

Scientific paper

10.1016/j.physleta.2004.08.037

We show that with respect to any bipartite division of modes, pure fermion gaussian states display the same type of structure in its entanglement of modes as that of the BCS wave function, namely, that of a tensor product of entangled two-mode squeezed fermion states. We show that this structure applies to a wider class of "isotropic" mixed fermion states, for which we derive necessary and sufficient conditions for mode entanglement.

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