Detection of Macroscopic Entanglement by Correlation of Local Observables

Details Detection of Macroscopic Entanglement by Correlation of Local Observables Detection of Macroscopic Entanglement by Correlation of Local Observables

2005-04-12

arxiv.org/abs/quant-ph/0504086v2

Phys. Rev. Lett. 95, 090401 (2005)

Physics

Quantum Physics

This is the published version. (4 pages, no figures.)

Scientific paper

10.1103/PhysRevLett.95.090401

We propose a correlation of local observables on many sites in macroscopic
quantum systems. By measuring the correlation one can detect, if any,
superposition of macroscopically distinct states, which we call macroscopic
entanglement, in arbitrary quantum states that are (effectively) homogeneous.
Using this property, we also propose an index of macroscopic entanglement.

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