648 citations · 7.5k across the 123 of their papers we have counts for
123 papers
A Lindbladian for exact renormalization of density operators in QFT
Samuel Goldman, Nima Lashkari, Robert G. Leigh
In arXiv:1609.03493, the authors extended the exact renormalization group (ERG) to arbitrary wave-functionals in quantum field theory (QFT). Applying this formalism, we show that t…
Null Raychaudhuri: Canonical Structure and the Dressing Time
Luca Ciambelli, Laurent Freidel, Robert G. Leigh
We initiate a study of gravity focusing on generic null hypersurfaces, non-perturbatively in the Newton coupling. We present an off-shell account of the extended phase space of the…
Crossed Products, Extended Phase Spaces and the Resolution of Entanglement Singularities
Marc S. Klinger, Robert G. Leigh
We identify a direct correspondence between the crossed product construction which plays a crucial role in the theory of Type III von Neumann algebras, and the extended phase space…
On the Inevitable Lightness of Vacuum
Laurent Freidel, Jerzy Kowalski-Glikman, Robert G. Leigh +1
In this essay, we present a new understanding of the cosmological constant problem, built upon the realization that the vacuum energy density can be expressed in terms of a phase s…
Extended Phase Space in General Gauge Theories
Marc S. Klinger, Robert G. Leigh, Pin-Chun Pai
In a recent paper, it was shown that in diffeomorphism-invariant theories, Noether charges associated with a given codimension-2 surface become integrable if one introduces an exte…
BRST Cohomology is Lie Algebroid Cohomology
Weizhen Jia, Marc S. Klinger, Robert G. Leigh
In this paper we demonstrate that the exterior algebra of an Atiyah Lie algebroid generalizes the familiar notions of the physicist's BRST complex. To reach this conclusion, we dev…