156 citations · 1.5k across the 58 of their papers we have counts for
7 papers · 1 filter
Deparametrization and quantization of the Taub universe
Gaston Giribet, Claudio Simeone
Previous analysis about the deparametrization and path integral quantization of cosmological models are extended to models which do not admit an intrinsic time. The formal expressi…
Gauge fixation and global phase time for minisuperspaces
Claudio Simeone
Homogeneous and isotropic cosmological models whose Hamilton-Jacobi equation is separable are deparametrized by turning their action functional into that of an ordinary gauge syste…
Quantization of minisuperspaces as ordinary gauge systems
Claudio Simeone
Simple cosmological models are used to show that gravitation can be quantized as an ordinary gauge system if the Hamilton-Jacobi equation for the model under consideration is separ…
Gauge invariance of parametrized systems and path integral quantization
Hernan De Cicco, Claudio Simeone
Gauge invariance of systems whose Hamilton-Jacobi equation is separable is improved by adding surface terms to the action fuctional. The general form of these terms is given for so…
Global phase time and path integral for the Kantowski--Sachs anisotropic univers
Claudio Simeone
The action functional of the anisotropic Kantowski--Sachs cosmological model is turned into that of an ordinary gauge system. Then a global phase time is identified for the model b…
Comment on the transition amplitude for toy universe models
Hernan De Cicco, Claudio Simeone
The parametrized system called ``ideal clock'' is turned into an ordinary gauge system and quantized by means of a path integral in which canonical gauges are admissible. Then the…
Comments on quantum cosmology with extrinsic time
Gaston Giribet, Claudio Simeone
The closed de Sitter universe is used to present a way to deal with the deparametrization and quantization of cosmological models with extrinsic time.