The paper constructs a formally unitary intertwiner between the exact and linearized BRST charges, yielding an automorphism that maps local operators to physical charged operators in gauge theories and perturbative gravity, at a formal level.
Holographic quantization of gravity in a black hole background
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abstract
It was recently observed in \cite{Park:2014tia} that the holographic nature of gravity may hold a key to quantization of gravity. The so-called "holographic quantization" has been carried out in \cite{Park:2014noa,Park:2015ota} for Einstein gravity in a flat background. Generalizing the procedure to a curved background is the main goal of the present work. In particular, we consider the Einstein action expanded around a Schwarzschild background
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Local Operator Algebras of Charged States in Gauge Theory and Gravity
The paper constructs a formally unitary intertwiner between the exact and linearized BRST charges, yielding an automorphism that maps local operators to physical charged operators in gauge theories and perturbative gravity, at a formal level.