Signatures for generalized macroscopic superpositions

Details Signatures for generalized macroscopic superpositions Signatures for generalized macroscopic superpositions

2007-01-29

arxiv.org/abs/quant-ph/0701204v1

Phys. Rev. Lett. 97, 170405 (2006)

Physics

Quantum Physics

4 pages, 2 figures, some changes made

Scientific paper

10.1103/PhysRevLett.97.170405

We develop criteria sufficient to enable detection of macroscopic coherence where there are not just two macroscopically distinct outcomes for a pointer measurement, but rather a spread of outcomes over a macroscopic range. The criteria provide a means to distinguish a macroscopic quantum description from a microscopic one based on mixtures of microscopic superpositions of pointer-measurement eigenstates. The criteria are applied to Gaussian-squeezed and spin-entangled states.

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