Results 121 to 130 of about 11,605 (193)

Cosmological evolution driven by polytropic fluids in an inhomogeneous spacetime

European Physical Journal C: Particles and Fields
Addressing the late-time accelerated expansion of the universe, known as the “dark energy problem”, remains a central challenge in cosmology. While the cosmological constant is the standard explanation, alternative models such as quintessence, phantom ...
Gilberto Aguilar-Pérez, Miguel Cruz, Mohsen Fathi, Daniel de Jesús García-Castro, J. R. Villanueva   +4 more
doaj   +1 more source

Geometrothermodynamic Cosmology. [PDF]

Entropy (Basel), 2023
Luongo O, Quevedo H.
europepmc   +1 more source

Mechanical cosmology: Simulating scalar fluctuations in expanding universes using synthetic mechanical lattices

Physical Review Research
Inspired by recent advances in observational astrophysics and continued explorations in the field of analog gravity, we discuss the prospect of simulating models of cosmology within the context of synthetic mechanical lattice experiments. We focus on the
Brendan Rhyno, Ivan Velkovsky, Peter Adshead, Bryce Gadway, Smitha Vishveshwara   +4 more
doaj   +1 more source

Past-directed scalar field gradients and scalar-tensor thermodynamics. [PDF]

Gen Relativ Gravit, 2023
Giusti A, Giardino S, Faraoni V.
europepmc   +1 more source

An exact solution approach to warm inflation using Tsallis and Barrow holographic dark energy entropy within Rastall gravity. [PDF]

Eur Phys J Plus, 2022
Saleem R, Shahid I, Sabir M.
europepmc   +1 more source

Quasi-geodesics in relativistic gravity. [PDF]

Eur Phys J C Part Fields, 2021
Faraoni V, Vachon G.
europepmc   +1 more source

Homogeneous and isotropic cosmology in general teleparallel gravity. [PDF]

Eur Phys J C Part Fields, 2023
Heisenberg L, Hohmann M, Kuhn S.
europepmc   +1 more source

Cosmological reconstruction and energy constraints in generalized Gauss-Bonnet-scalar-kinetic-matter couplings. [PDF]

Sci Rep, 2020
Kaczmarek AZ, Szczęśniak D.
europepmc   +1 more source

Null Distance and Convergence of Lorentzian Length Spaces. [PDF]

Ann Henri Poincare, 2022
Kunzinger M, Steinbauer R.
europepmc   +1 more source

Damping of gravitational waves in f(R) gravity

European Physical Journal C: Particles and Fields
We investigate the damping of gravitational waves (GW) in f(R) gravity by matter. By applying the kinetic theory, we examine the first-order approximation of the relativistic Boltzmann equation.
Haiyuan Feng, Laiyuan Su, Rong-Jia Yang, Wei-Qiang Chen   +3 more
doaj   +1 more source