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Quantum Separability of the vacuum for Scalar Fields with a Boundary

Jae-Weon Lee·Jaewan Kim·Taeseung Choi
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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.

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Jae-Weon Lee, Jaewan Kim, Taeseung Choi. 2006-09-27. Quantum Separability of the vacuum for Scalar Fields with a Boundary. https://doi.org/10.1103/physreva.74.044304

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