author = "González-Díaz, Pedro F."

Encontrado 216 documentos, página mostrada 1 de 22

Quintessential holography

Description: By using the Bousso geometrical covariant procedure we consider in this paper the holographic principle as applied to asymptotic Friedmann-Robertson- Walker space-times whose vacuum dark energy is due to the presence of a quintessential dark and phantom-energy scalar field with constant equation of ...
Language(s): Inglés

Cosmic Transmutation Conjecture.

Description: This paper analyzes the big trip phenomenon, restricting it to happen only in the context of the multiverse when the involved wormhole is asymptotically flat and recent criticisms are pointless. A new kind of Lorentzian asymptotically anti-de Sitter wormholes is considered in some detail and it is s...
Language(s): Inglés

Why a Universe as a whole must be a Quantum Object.

Description: Technical and physical reasons are given in favor of the idea that single universes, accelerating or not, essentially are quantum-mechanical entities without any classical analogs, even when they are forming part of a given multi- verse. , Peer Reviewed
Language(s): Inglés

Life originated during accelerating expansion in the multiverse

Description: It is argued that all notions associated with the origin of life should be related with the participatory anthropic principle of Wheeler and must be extended into the realm of the multiverse. Also discussed is the notion that life can only be possible in a given universe during a period along which ...
Language(s): Italiano

Is the Cosmic Big Trip Just a Classical Wormhole Artifact?.

Description: Starting with the original sub-quantum dark energy model, the current accelerating phase of the evolution of the universe is considered by constructing most economical cosmic models that use just general relativity and some dominating quantum effects associated with the probabilistic description of ...
Language(s): Inglés

On the accretion of phantom energy onto wormholes

Description: By using a properly generalized accretion formalism it is argued that the accretion of phantom energy onto a wormhole does not make the size of the wormhole throat to comovingly scale with the scale factor of the universe, but instead induces an increase of that size so big that the wormhole can eng...
Language(s): Inglés

Nonclassical states in quantum gravity

Description: We discuss possible states of the quantized gravitational field which have no classical counterpart and reflect in the matter field sector as fundamental phenomena. It is known that wormholes can be pictured as squeezed states of spacetime and that such wormholes are able to induce the kind of decoh...
Language(s): Inglés

On the gravitational lagrangian with R2-terms

Description: A new gravitational quantum lagrangian with logarithmic dependence on R is suggested. The resulting propagator seems to have no tachyon or unphysical state poles, nor complex conjugate poles on the physical sheet. © 1985. , Peer Reviewed
Language(s): Inglés

Axion instanton for higher-derivative quantum gravity

Description: A new euclidean solution is obtained for an axion coupled to gravity with a curvature-squared term. This instanton describes the nucleation of a baby universe. It is shown that the effect of the R2-term is to suppress the interactions of baby universes. © 1989. , Peer Reviewed
Language(s): Inglés

Baby universe metric equivalent to an interior black-hole metric

Description: It is shown that the maximally extended metric corresponding to a large wormhole is the unique possible wormhole metric whose baby universe sector is conformally equivalent to the maximal inextendible Kruskal metric corresponding to the interior region of a Schwarzschild black hole whose gravitation...
Language(s): Inglés

Encontrado 216 documentos, página mostrada 1 de 22

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