Monogamy inequality for distributed Gaussian entanglement

Details Monogamy inequality for distributed Gaussian entanglement Monogamy inequality for distributed Gaussian entanglement

2006-05-02

arxiv.org/abs/quant-ph/0605021v4

Phys. Rev. Lett. 98, 050503 (2007)

Physics

Quantum Physics

4 pages, no figures. Several improvements, proof made more transparent, conclusions enriched

Scientific paper

10.1103/PhysRevLett.98.050503

We show that for all n-mode Gaussian states of continuous variable systems, the entanglement shared among n parties exhibits the fundamental monogamy property. The monogamy inequality is proven by introducing the Gaussian tangle, an entanglement monotone under Gaussian local operations and classical communication, which is defined in terms of the squared negativity in complete analogy with the case of n-qubit systems. Our results elucidate the structure of quantum correlations in many-body harmonic lattice systems.

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