Nonclassicality of coherent states: Entanglement of joint statistics

Abstract

Simple joint measurements of pairs of observables reveal that states considered universally as classical-like, such as SU(2) spin coherent states, Glauber coherent states, and thermal states are actually nonclassical. We show that this holds because we can find a joint measurement the statistics of which is not separable. Eventually this may be extended to all states different from the maximally mixed state.

8 pages, 2 figures

References in corpus (1)

• Entanglement for all quantum states

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