Results 51 to 60 of about 2,700,632 (80)

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

Reconstruction of mimetic gravity in a non-singular bouncing universe from quantum gravity

, 2019
We illustrate a general reconstruction procedure for mimetic gravity. Focusing on a bouncing cosmological background, we derive general properties that must be satisfied by the function $f(\Box\phi)$ implementing the limiting curvature hypothesis.
de Cesare, Marco
core   +1 more source

Relativistic Quantum Non-Locality [PDF]

arXiv, 2000
The controversy between relativistic causality and quantum non-locality can be resolved by establishing the general relativistic background of quantum non-locality.
arxiv  

Loop quantum cosmology and inhomogeneities

, 2006
Inhomogeneities are introduced in loop quantum cosmology using regular lattice states, with a kinematical arena similar to that in homogeneous models considered earlier.
A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A.S. Eddington, C. Rovelli, C. Rovelli, G. Date, G. Immirzi, G.J.F. Barbero, H. Sahlmann, H. Sahlmann, K. Banerjee, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Gaul, Martin Bojowald, T. Thiemann   +31 more
core   +1 more source

Lectures on Mathematical Cosmology [PDF]

arXiv, 2004
We present mathematical details of several cosmological models, whereby the topological and the geometrical background will be emphasized.
arxiv  

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

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

Influential nodes identification in complex networks: a comprehensive literature review. [PDF]

Beni Suef Univ J Basic Appl Sci, 2023
Ait Rai K, Machkour M, Antari J.
europepmc   +1 more source