Abstract
Abstract
Casimir energy in presence of a weak gravitational field is discussed taking into account the issues related to energy and its conservation in a curved background. It is well-known that there are inherent difficulties in defining energy in general relativity, essentially due to its non-localizability. Using the concept of quasi-local mass and energy, it is shown that it is possible to attribute a Tolman mass to a massless scalar field confined to a Casimir cavity. Such non-local mass coincides—as expected—with the Casimir energy. The present approach offers an alternative derivation of the vacuum buoyancy force acting on a Casimir cavity, confirming the results presented by Calloni et al in a series of papers devoted to explore the possibility of experimentally weighting the Casimir vacuum (the so-called Archimedes experiment).
Subject
Physics and Astronomy (miscellaneous)
Cited by
8 articles.
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