https://doi.org/10.1140/epjc/s10052-019-6574-1
Regular Article - Theoretical Physics
Casimir effect in quadratic theories of gravity
1
Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, 84084, Fisciano, SA, Italy
2
INFN-Gruppo Collegato di Salerno, Fisciano, Italy
3
Van Swinderen Institute, University of Groningen, 9747 AG, Groningen, The Netherlands
* e-mail: lbuoninfante@sa.infn.it
Received:
4
December
2018
Accepted:
7
January
2019
Published online:
18
January
2019
In this paper, we study the Casimir effect in a curved spacetime described by gravitational actions quadratic in the curvature. In particular, we consider the dynamics of a massless scalar field confined between two nearby plates and compute the corresponding mean vacuum energy density and pressure in the framework of quadratic theories of gravity. Since we are interested in the weak-field limit, as far as the gravitational sector is concerned we work in the linear regime. Remarkably, corrections to the flat spacetime result due to extended models of gravity (although very small) may appear at the first-order of our perturbative analysis, whereas general relativity contributions start appearing at the second order. Future experiments on the Casimir effect might represent a useful tool to test and constrain extended theories of gravity.
© The Author(s), 2019
