Dynamical Casimir effect with screened scalar fields
arxiv(2024)
摘要
Understanding the nature of dark energy and dark matter is one of modern
physics' greatest open problems. Scalar-tensor theories with screened scalar
fields like the chameleon model are among the most popular proposed solutions.
In this article, we present the first analysis of the impact of a chameleon
field on the dynamical Casimir effect, whose main feature is the particle
production associated with a resonant condition of boundary periodic motion in
cavities. For this, we employ a recently developed method to compute the
evolution of confined quantum scalar fields in a globally hyperbolic spacetime
by means of time-dependent Bogoliubov transformations. As a result, we show
that particle production is reduced due to the presence of the chameleon field.
In addition, our results for the Bogoliubov coefficients and the mean number of
created particles agree with known results in the absence of a chameleon field.
Our results initiate the discussion of the evolution of quantum fields on
screened scalar field backgrounds.
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