Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/24109
Tipo: Artigo
Título: Loop quantization of a model for D = 1 + 2 (anti)de sitter gravity coupled to topological matter
Autor(es): Oporto, Zui
Constantinidis, Clisthenis P.
Piguet, Olivier
Abstract: We present a complete quantization of Lorentzian D = 1 + 2 gravity with cosmological constant, coupled to a set of topological matter fields. The approach of loop quantum gravity is used thanks to a partial gauge fixing leaving a residual gauge invariance under a compact semi-simple gauge group, namely Spin(4) = SU(2) × SU(2). A pair of quantum observables is con- structed, which are non-trivial despite being gauge-equivalent to zero at the classical level. A semi-classical approximation based on appropriately defined coherent states shows non-vanishing expectation values for them, thus not reproducing their classical behaviour.
Palavras-chave: Quantum gravity
Topological theories
Loop quantization
Lower dimensional gravity
Editor: Classical and Quantum Gravity
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1088/0264-9381/32/5/055007
http://www.locus.ufv.br/handle/123456789/24109
Data do documento: 2015
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