Periodic orbits of a Hamiltonian system related with the Friedmann–Robertson–Walker system in rotating coordinates
Sign Up to like & getrecommendations! Published in 2020 at "Physica D: Nonlinear Phenomena"
DOI: 10.1016/j.physd.2020.132673
Abstract: Abstract We provide sufficient conditions on the four parameters of a Hamiltonian system, related with the Friedmann-Robertson-Walker Hamiltonian system in a rotating reference frame, which guarantee the existence of 12 continuous families of periodic orbits,… read more here.
Keywords: system; friedmann robertson; system related; related friedmann ... See more keywords
Casimir effect for parallel plates in a Friedmann-Robertson-Walker universe
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DOI: 10.1103/physrevd.95.065024
Abstract: We evaluate the Hadamard function, the vacuum expectation values (VEVs) of the field squared and the energy-momentum tensor for a massive scalar field with general curvature coupling parameter in the geometry of two parallel plates… read more here.
Keywords: geometry; friedmann robertson; parallel plates; robertson walker ... See more keywords
Casimir effect and Stefan–Boltzmann law at finite temperature in a Friedmann–Robertson–Walker universe
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DOI: 10.1142/s0218271820500455
Abstract: A spatially flat Friedmann-Robertson-Walker background with a general scale factor is considered. In this space-time, the energy-momentum tensor of the scalar field with a general curvature coupling parameter is obtained. Using the Thermo Field Dynamics… read more here.
Keywords: temperature; casimir effect; friedmann robertson; effect ... See more keywords