On Entanglement with Vacuum

Details On Entanglement with Vacuum On Entanglement with Vacuum

2005-07-16

arxiv.org/abs/quant-ph/0507151v1

Physics

Quantum Physics

3 pages, 1 eps figure

Scientific paper

The so-called entanglement with vacuum is not a property of the Fock space, but of some rather pathological representations of CCR/CAR algebras. In some other Fock space representations the notion simply does not exist. We have checked all the main Gedanken experiments where the notion of entanglement with vacuum was used, and found that all the calculations could be performed at a representation-independent level. In particular any such experiment can be formulated in a Fock-space representation where the notion of entanglement with vacuum is meaningless. So, for the moment there is no single experiment where the notion is needed, and probably it is simply unphysical.

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