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Gauge Fixing and Field Redefinitions of the Hartle-Hawking Wavefunction Path Integral
(Andromeda Proceedings, 2021)
We review some recent results concerning the Hartle-Hawking wavefunction of the universe. We focus on pure Einstein theory of gravity in the presence of a positive cosmological constant. We carefully implement the gauge-fixing ...
Holographic observables at large d
(American Physical Society, 2022-01-12)
We study holographically nonlocal observables in field theories at finite temperature and in the large d limit. These include the Wilson loop, the entanglement entropy, as well as an extension to various dual extremal ...
Probability distribution for the quantum universe
(Springer, 2021-12-22)
We determine the inner product on the Hilbert space of wavefunctions of the universe by imposing the Hermiticity of the quantum Hamiltonian in the context of the minisuperspace model. The corresponding quantum probability ...
IR dynamics and entanglement entropy
(American Physical Society, 2020-03-16)
We consider scattering of Faddeev-Kulish electrons in QED and study the entanglement between the hard and soft particles in the final state at the perturbative level. The soft photon spectrum naturally splits into two ...
A unimodular-like string effective description
(Elsevier, 2023-04-14)
We show that vanishing of the sigma-model beta-functions for the metric gμν , antisymmetric tensor Bμν and dilaton Phi of any string-theory model in D dimensions at tree level can be obtained from a universal effective ...
Bridging the static patches: de Sitter holography and entanglement
(Springer, 2023-08-14)
In the context of de Sitter static-patch holography, two prescriptions have been put forward for holographic entanglement entropy computations, the monolayer and bilayer proposals. In this paper, we reformulate both ...
Soft photon radiation and entanglement
(Springer, 2021-08-18)
We study the entanglement between soft and hard particles produced in generic scattering processes in QED. The reduced density matrix for the hard particles, obtained via tracing over the entire spectrum of soft photons, ...
Liouville quantum gravity
(Elsevier, 2020-01-06)
We define a three-dimensional quantum theory of gravity as the holographic dual of the Liouville conformal field theory. The theory is consistent and unitary by definition. The corresponding theory of gravity with negative ...
Wavefunction of the universe: Reparametrization invariance and field redefinitions of the minisuperspace path integral
(Elsevier, 2021-11-03)
We consider the Hartle–Hawking wavefunction of the universe defined as a Euclidean path integral that satisfies the “no-boundary proposal.” We focus on the simplest minisuperspace model that comprises a single scale factor ...
Wavefunction of the universe: Diffeomeorphism invariance and field redefinitions
(Proceedings of Science (SISSA), 2022-11-23)
We review some recent results concerning the Hartle-Hawking wavefunction of the universe. We focus on pure Einstein theory of gravity in the presence of a positive cosmological constant. We carefully implement the gauge-fixing ...