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2018
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2019

Kinematical Gravitational Charge Algebra

Freidel, Laurent, Livine, Etera R., Pranzetti, Daniele

Understand

When formulated in terms of connection and coframes, and in the time gauge, the phase space of general relativity consists of a pair of conjugate fields: the flux 2-form and the Ashtekar connection.

On this phase-space, one has to impose the Gauss constraints, the vector, and scalar Hamiltonian constraints.
These are respectively generating local SU(2) gauge transformations, spatial diffeomorphisms, and time diffeomorphisms.
We write the Gauss and space diffeomorphism constraints as conservation laws for a set of boundary charges, representing spin and momenta, respectively.