Results 51 to 60 of about 69,216 (300)
Rastall gravity is equivalent to Einstein gravity
Physics Letters B, 2018 Rastall gravity, originally developed in 1972, is currently undergoing a significant surge in popularity. Rastall gravity purports to be a modified theory of gravity, with a non-conserved stress–energy tensor, and an unusual non-minimal coupling between ...
Matt Visser
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The P-V phase transition of the FRW universe
European Physical Journal C: Particles and Fields, 2022 We define thermodynamic pressure P by work density W as the conjugate quantity of thermodynamic volume V from field equation. We derive the equations of state P=P(V, T) for the Friedmann–Robertson–Walker (FRW) universe in Einstein gravity and a modified ...
Shi-Bei Kong +4 more
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ON EXPONENTIAL MODIFIED GRAVITY [PDF]
International Journal of Modern Physics A, 2013 A modified theory of gravity with the function F(R) = R exp (αR) instead of Ricci scalar R in the Einstein–Hilbert action is considered and analyzed. The action of the model is converted into Einstein–Hilbert action at small value of the parameter α. From local tests we obtain a bound on the parameter α ≤ 10-6 cm 2.
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, 2013 added references; made some clarifications; 8 ...
Dimitrijevic, Ivan +3 more
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Dark energy and modified gravity in degenerate higher-order scalar–tensor (DHOST) theories: A review [PDF]
International Journal of Modern Physics D, 2018 This paper reviews scalar–tensor theories characterized by a Lagrangian that, despite the presence of second-order derivatives, contains a single scalar degree of freedom.
D. Langlois
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Consequences of thermal fluctuations of well-known black holes in modified gravity [PDF]
Classical and quantum gravity, 2020 Quantum fluctuation consequences have significant role in high-energy physics. These fluctuation often regarded as a correction of the infrared (IR) limit.
A. Jawad
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Early modified gravity: Implications for cosmology [PDF]
Physical Review D, 2014 We study the effects of modifications of gravity after Big Bang Nucleosynthesis (BBN) which would manifest themselves mainly before recombination. We consider their effects on the Cosmic Microwave Background (CMB) radiation and on the formation of large scale structure.
Brax, Philippe +4 more
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Chaos in a Magnetized Modified Gravity Schwarzschild Spacetime
Universe, 2022 Based on the scalar–tensor–vector modified gravitational theory, a modified gravity Schwarzschild black hole solution has been given in the existing literature.
Daqi Yang +5 more
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GRAVITY FROM A MODIFIED COMMUTATOR [PDF]
International Journal of Modern Physics D, 2005 We show that a suitably chosen position-momentum commutator can elegantly describe many features of gravity, including the IR/UV correspondence and dimensional reduction ("holography"). Using the most simplistic example based on dimensional analysis of black holes, we construct a commutator which qualitatively exhibits these novel properties of ...
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Cosmic voids in modified gravity scenarios [PDF]
Astronomy & Astrophysics, 2019 Modified gravity (MG) theories aim to reproduce the observed acceleration of the Universe by reducing the dark sector while simultaneously recovering General Relativity (GR) within dense environments.
E. Perico +3 more
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