New 'phase' of quantum gravity

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dc.creatorWang, Charles H. -T.
dc.date2006-05-24
dc.date2006-09-20
dc.date.accessioned2026-07-07T07:35:55Z
dc.date.available2026-07-07T07:35:55Z
dc.descriptionThe emergence of loop quantum gravity over the past two decades has stimulated a great resurgence of interest in unifying general relativity and quantum mechanics. Amongst a number of appealing features of this approach are the intuitive picture of quantum geometry using spin networks and powerful mathematical tools from gauge field theory. However, the present form of loop quantum gravity suffers from a quantum ambiguity, due to the presence of a free (Barbero-Immirzi) parameter. Following recent progress on the conformal decomposition of gravitational fields, we present a new phase space for general relativity. In addition to spin-gauge symmetry, the new phase space also incorporates conformal symmetry making the description parameter free. The Barbero-Immirzi ambiguity is shown to occur only if the conformal symmetry is gauge-fixed prior to quantization. By withholding its full symmetries, the new phase space offers a promising platform for the future development of loop quantum gravity. This paper aims to provide an exposition, at a reduced technical level, of the above theoretical advances and their background developments. Further details are referred to cited references.
dc.description17 pages, 6 figures, To appear in the 2006 Christmas Issue of Phil. Trans. Roy. Soc. A
dc.identifierhttps://arxiv.org/abs/gr-qc/0605124
dc.identifierhttp://arxiv.org/abs/gr-qc/0605124
dc.identifierPhil.Trans.Roy.Soc.Lond. A364 (2006) 3375-3388
dc.identifierdoi:10.1098/rsta.2006.1904
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/120256
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.subjectPopular Physics
dc.subjectQuantum Physics
dc.titleNew 'phase' of quantum gravity
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