|0>|1>+|1>|0>

Abstract

I give a simple argument that demonstrates that the state |0>|1>+|1>|0>, with |0> denoting a state with 0 particles and |1> a 1-particle state, is entangled in spite of recent claims to the contrary. I also discuss new viewpoints on the old controversy about whether the above state can be said to display single-particle or single-photon nonlocality.

A more serious version, almost 2.36 pages, but still an unnormalized title

References in corpus (2)

• Classical and quantum communication without a shared reference frame
• Quantifying the resource of sharing a reference frame

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