Unambiguous phase spaces for subregions
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Publication:2421122
DOI10.1007/JHEP03(2019)116zbMATH Open1414.83033arXiv1901.09857WikidataQ128181954 ScholiaQ128181954MaRDI QIDQ2421122
Author name not available (Why is that?)
Publication date: 8 June 2019
Published in: (Search for Journal in Brave)
Abstract: The covariant phase space technique is a powerful formalism for understanding the Hamiltonian description of covariant field theories. However, applications of this technique to problems involving subregions, such as the exterior of a black hole, have heretofore been plagued by boundary ambiguities. We provide a resolution of these ambiguities by directly computing the symplectic structure from the path integral, showing that it may be written as a contour integral around a partial Cauchy surface. This result has implications for gauge symmetry and entanglement.
Full work available at URL: https://arxiv.org/abs/1901.09857
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