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arxiv: 0810.1839 · v1 · submitted 2008-10-10 · 🪐 quant-ph

Global entanglement and coherent states in an N-partite system

classification 🪐 quant-ph
keywords coherententangledgloballystatestatessystemcomplementconsider
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We consider a quantum system consisting of N parts, each of which is a "quKit" described by a K dimensional Hilbert space. We prove that in the symmetric subspace, S, a pure state is not globally entangled, if and only if it is a coherent state. It is also shown that in the orthogonal complement all states are globally entangled.

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