Can boundaries and Hamiltonians get along? | CQG+

Can boundaries and Hamiltonians get along? | CQG+: "Boundaries are ubiquitous in physics, if anything because most material objects tend to have one… In the context of gravity they play a number of interesting roles: from the definition of conserved quantities in asymptotically flat spacetimes to holography (no lasers here, sorry) or the modeling of black holes. A natural question in the context of the canonical quantization of gravitational theories is how to obtain their Hamiltonian description – in particular the constraints – in the presence of boundaries."

Read the full article in Classical and Quantum Gravity:
Boundary Hilbert spaces and trace operators, 
Barbero, J. Fernando G., et al 2017. Class. Quantum Grav. 34, 095005.

Nb. A very nice worthy paper! 




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