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• W2579722406 abstract "We study the discretization of 3d gravity with $Lambda=0$ following the loop quantum gravity framework. In the process, we realize that different choices of polarization are possible. This allows to introduce a new discretization based on the triad as opposed to the connection as in the standard loop quantum gravity framework. We also identify the classical non-trivial symmetries of discrete gravity, namely the Drinfeld double, given in terms of momentum maps. Another choice of polarization is given by the Chern-Simons formulation of gravity. Our framework also provides a new discretization scheme of Chern-Simons, which keeps track of the link between the continuum variables and the discrete ones. We show how the Poisson bracket we recover between the Chern-Simons holonomies allows to recover the Goldman bracket. There is also a transparent link between the discrete Chern-Simons formulation and the discretization of gravity based on the connection (loop gravity) or triad variables (dual loop gravity)." @default.
• W2579722406 created "2017-01-26" @default.
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• W2579722406 date "2017-10-23" @default.
• W2579722406 modified "2023-10-18" @default.
• W2579722406 title "Discretization of 3d gravity in different polarizations" @default.
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• W2579722406 doi "https://doi.org/10.1103/physrevd.96.086017" @default.
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