Quantum Separability of the vacuum for Scalar Fields with a Boundary
arXiv:quant-ph/0607202 · doi:10.1103/PhysRevA.74.044304
Abstract
Using the Green's function approach we investigate separability of the vacuum state of a massless scalar field with a single Dirichlet boundary. Separability is demonstrated using the positive partial transpose criterion for effective two-mode Gaussian states of collective operators. In contrast to the vacuum energy, entanglement of the vacuum is not modified by the presence of the boundary.
4 pages, 1 figure, Revtex, minor corrections. submitted to Phy. Rev. A
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