High Energy Physics - Theory
[2308.13360] Holography for Small Values of the Cosmological Constant
https://arxiv.org/abs/2308.13360
Tom Banks
We review recent work on holography for finite area causal diamonds and explore its implications for the description of such diamonds in the Anti-deSitter space Conformal Field Theory correspondence. We argue that the algebra of operators in a finite area diamond is well defined in a UV cutoff tensor network construction, but is not related in any simple way to any infinite von Neumann sub-algebra of the boundary algebra or its cross product. Our argument relies on a novel construction of tensor networks that preserves rotation invariance.
[2308.08861] Soft theorems in de Sitter spacetime
https://arxiv.org/abs/2308.08861
Pujian Mao, Kai-Yu Zhang
In this paper, we derive a soft photon theorem and a soft gluon theorem in the de Sitter spacetime from the Ward identity of the near cosmological horizon large gauge transformation. Taking the flat limit of the de Sitter spacetime, the soft theorems naturally recover the corresponding flat spacetime soft theorems.
Mathematical Physics
[2308.10518] Heun-type solutions for the Dirac particle on the curved background of Minkowski space-times
https://arxiv.org/abs/2308.10518
General Relativity and Quantum Cosmology
[2308.09826] Notes on Gravitational Physics
https://arxiv.org/abs/2308.09826
These notes are self-contained, with the first six chapters used for a one-semester course with recommended texts by Wald, Misner, Thorne, and Wheeler (MTW), and, particularly for gravitational waves, by Schutz and by Thorne and Blandford. ...
