Zobrazeno 1 - 10
of 17
pro vyhledávání: '"[PACS] Quantum cosmology"'
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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In this paper we study the accretion of dark energy onto a black hole in the cases that dark energy is equipped with a positive cosmological constant and when the space-time is described by a Schwarzschild-de Sitter metric. While the first case is th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e44a210037211855039b87fc372ee4e
https://doi.org/10.1007/s10714-009-0808-8
https://doi.org/10.1007/s10714-009-0808-8
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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We present a complete quantization of an approximately homogeneous and isotropic universe with small scalar perturbations. We consider the case in which the matter content is a minimally coupled scalar field and the spatial sections are flat and comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3962130b587f7be279bc3dedb6c65259
https://doi.org/10.1103/physrevd.88.044013
https://doi.org/10.1103/physrevd.88.044013
Autor:
Tomasz Pawlowski, Wojciech Kamiński
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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9 p.
The self-adjointness of an evolution operator Θ corresponding to the model of the flat FRW universe with massless scalar field and cosmological constant quantized in the framework of loop quantum cosmology is studied in the case > 0. It is
The self-adjointness of an evolution operator Θ corresponding to the model of the flat FRW universe with massless scalar field and cosmological constant quantized in the framework of loop quantum cosmology is studied in the case > 0. It is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e914b2e3d0203077002b1b8c0b5f3bf
http://hdl.handle.net/10261/74110
http://hdl.handle.net/10261/74110
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
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A third quantization formalism is applied to a simplified multiverse scenario. A well-defined quantum state of the multiverse is obtained which agrees with standard boundary condition proposals. These states are found to be squeezed, and related to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd9c15412a3c34a9078ac4387837f968
https://doi.org/10.1103/physrevd.81.083529
https://doi.org/10.1103/physrevd.81.083529
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
8 pags. ; 2 figs.
The dynamics of an inhomogeneous universe is studied with the methods of loop quantum cosmology, via a so-called hybrid quantization, as an example of the quantization of vacuum cosmological spacetimes containing gravitational
The dynamics of an inhomogeneous universe is studied with the methods of loop quantum cosmology, via a so-called hybrid quantization, as an example of the quantization of vacuum cosmological spacetimes containing gravitational
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f461f321c9d5dc434036c55a221e1454
http://hdl.handle.net/10261/24490
http://hdl.handle.net/10261/24490
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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In this paper, we study the role of coherent states in the realm of quantum cosmology, both in a second-quantized single universe and in a third-quantized quantum multiverse. In particular, most emphasis will be paid to the quantum description of mul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::621ce937145c8d9f66ebfa487eb42fc5
http://arxiv.org/abs/0909.3063
http://arxiv.org/abs/0909.3063
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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11 pages, no figures.-- PACS nrs.: 04.60.Pp, 04.60.Kz, 98.80.Qc.
We analyze the loop quantization of the family of vacuum Bianchi I spacetimes, a gravitational system of which classical solutions describe homogeneous anisotropic cosmologies. We
We analyze the loop quantization of the family of vacuum Bianchi I spacetimes, a gravitational system of which classical solutions describe homogeneous anisotropic cosmologies. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83305f170b4f21b88bd25c28a7118688
http://arxiv.org/abs/0804.3157
http://arxiv.org/abs/0804.3157
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
7 pags.
After a suitable gauge fixing, the local gravitational degrees of freedom of the Gowdy S1 × S2 and S3 cosmologies are encoded in an axisymmetric field on the sphere S2. Recently, it has been shown that a standard field parametrization o
After a suitable gauge fixing, the local gravitational degrees of freedom of the Gowdy S1 × S2 and S3 cosmologies are encoded in an axisymmetric field on the sphere S2. Recently, it has been shown that a standard field parametrization o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::55ece7225c7df18f971d08906e96655e
http://hdl.handle.net/10261/16312
http://hdl.handle.net/10261/16312
Publikováno v:
E-Prints Complutense. Archivo Institucional de la UCM
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Digital.CSIC. Repositorio Institucional del CSIC
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
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Digital.CSIC. Repositorio Institucional del CSIC
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
5 pags.
We quantize an inhomogeneous cosmological model using techniques that include polymeric quantization. More explicitly, we construct well-defined operators to represent the constraints and find the physical Hilbert space formed by their s
We quantize an inhomogeneous cosmological model using techniques that include polymeric quantization. More explicitly, we construct well-defined operators to represent the constraints and find the physical Hilbert space formed by their s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d62695dae2b46bbd995bab7c956697b
https://eprints.ucm.es/id/eprint/29818/1/Garay18.pdf
https://eprints.ucm.es/id/eprint/29818/1/Garay18.pdf
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
20 pags.
The purpose of this paper is to study in detail the problem of defining unitary evolution for linearly polarized S1 × S2 and S3 Gowdy models (in vacuum or coupled to massless scalar fields). We show that in the Fock quantizations of th
The purpose of this paper is to study in detail the problem of defining unitary evolution for linearly polarized S1 × S2 and S3 Gowdy models (in vacuum or coupled to massless scalar fields). We show that in the Fock quantizations of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0bfb7e316830ae32833fe410735d9a3f
http://hdl.handle.net/10261/16316
http://hdl.handle.net/10261/16316