Results 31 to 40 of about 20,723 (77)

Quantum Cosmological Relational Model of Shape and Scale in 1-d

, 2011
Relational particle models are useful toy models for quantum cosmology and the problem of time in quantum general relativity. This paper shows how to extend existing work on concrete examples of relational particle models in 1-d to include a notion of ...
Abramowitz M, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E, Anderson E Barbour J B, Barbour J B, Barbour J B, Barbour J B, Barbour J B, Barbour J B, Barbour J B, Barbour J B Elze H-T, Barbour J B Foster B Z, Barbour J B Smolin L, Barvinsky A O, Barvinsky A O, Bojowald M, Courant R, Dirac P A M, Edward Anderson, Frose Fischer C, Gryb S B, Halliwell J J, Harrison E R, Hartle J B, Isham C J, Isham C J, Kiefer C, Kuchař K V, Kuchař K V, Kuchař K V, Kuchař K V, Kuchař K V Kunstatter G Vincent D Williams J, Lanczos C, Landau L D, Marchal C, Messiah A, Milne E A, Misner C W, Misner C W, Misner C W, Mizushima M, Moss I, Pauling L, Peebles P J E, Penrose R, Rindler W, Robinett R W, Rovelli C, Ryan M, Schwinger J, Smolin L, Smolin L, Tetradis N, Wheeler J A, Wilson A H, Wiltshire D L, Á Gergely L, Á Gergely L   +82 more
core   +1 more source

GUP-Corrected Black Hole Thermodynamics and the Maximum Force Conjecture

, 2018
We show that thermodynamics for an asymptotically flat Schwarzschild black hole leads to a force of magnitude $c^4/(2G)$. This remains true if one considers the simplest form of correction due to the generalized uncertainty principle.
Ong, Yen Chin
core   +1 more source

Unimodular Loop Quantum Cosmology

, 2010
Unimodular gravity is based on a modification of the usual Einstein-Hilbert action that allows one to recover general relativity with a dynamical cosmological constant.
A. Ashtekar, A. Ashtekar, A. Einstein, C. Rovelli, C. J. Isham, D. Marolf, Dah-Wei Chiou, M. Bojowald, Marc Geiller, P. A. M. Dirac, R. M. Wald, S. Hawking, T. Thiemann   +12 more
core   +3 more sources

Reparameterization invariants for anisotropic Bianchi I cosmology with a massless scalar source

, 2007
Intrinsic time-dependent invariants are constructed for classical, flat, homogeneous, anisotropic cosmology with a massless scalar material source. Invariance under the time reparameterization-induced canonical symmetry group is displayed explicitly ...
A. Ashtekar, A. Komar, A. Schmitz, B. DeWitt, B. Drittrich, B. Drittrich, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C.J. Isham, C.J. Isham, D. C. Salisbury, D. Marolf, D.C. Salisbury, I. Kouletsis, J Bicak, J. Barbour, J. Géhéniau, J. Helpert, J. Stachel, J.D. Brown, J.M. Pons, J.M. Pons, J.M. Pons, J.M. Pons, J.M. Pons, J.M. Pons, K.V. Kuchar, K.V. Kuchar, K.V. Kuchar, M. Bojowald, M. Bojowald, P.A.M. Dirac, P.G. Bergmann, P.G. Bergmann, P.G. Bergmann, P.G. Bergmann   +38 more
core   +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

More on the first-order thermodynamics of scalar-tensor and Horndeski gravity. [PDF]

Eur Phys J C Part Fields, 2023
Faraoni V, Houle J.
europepmc   +1 more source

Observational Exclusion of a Consistent Quantum Cosmology Scenario

, 2015
It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations.
Barrau, Aurelien, Bolliet, Boris, Grain, Julien, Schander, Susanne   +3 more
core   +3 more sources

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Scalar field as a perfect fluid: thermodynamics of minimally coupled scalars and Einstein frame scalar-tensor gravity. [PDF]

Eur Phys J C Part Fields, 2023
Faraoni V, Giardino S, Giusti A, Vanderwee R.   +3 more
europepmc   +1 more source

SIRA: a model for propagation and rumor control with epidemic spreading and immunization for healthcare 5.0. [PDF]

Soft comput, 2023
Kumar A, Aggarwal N, Kumar S.
europepmc   +1 more source