2020/03/17 by A. F. Santos, S. C. Ulhoa, Faqir C. Khanna
Physics and Astronomy · #Casimir effect #Casimir pressure #Cosmology and Gravitation Theories #Coupling (piping) #Curvature #Field (mathematics) #Metric expansion of space #Noncommutative and Quantum Gravity Theories #Quantum Electrodynamics and Casimir Effect #Scalar (mathematics) #Scalar field #Scale factor (cosmology) #Universe #hep-th
paper · pdf · doi:10.1142/s0218271820500455
published in International Journal of Modern Physics D 29(07), 2050045 (World Scientific) · 14 pages, accepted for publication in IJMPD
arxiv created 2020/03/17 · openalex created_date 2020/03/23 · openalex publication_date 2020/03/24 · arxiv updated 2020/07/15 · openalex updated_date 2026/08/05
A spatially flat Friedmann–Robertson–Walker background with a general scale factor is considered. In this spacetime, the energy–momentum tensor of the scalar field with a general curvature coupling parameter is obtained. Using the Thermo Field Dynamics (TFD) formalism, the Stefan–Boltzmann law and the Casimir effect at finite temperature are calculated. The Casimir effect at zero temperature is also considered. The expansion of the universe changes these effects. A discussion of these modifications is presented.