Modular Hamiltonian for de Sitter diamonds
MB Fröb - Journal of High Energy Physics, 2023 - Springer
A bstract We determine the Tomita-Takesaki modular data for CFTs in double cone and light
cone regions in conformally flat spacetimes. This includes in particular the modular …
cone regions in conformally flat spacetimes. This includes in particular the modular …
Relative entropy in de Sitter spacetime is a Noether charge
MB Fröb, A Much, K Papadopoulos - Physical Review D, 2023 - APS
We compute the relative entropy between the vacuum and a coherent state for a massive
scalar field in de Sitter spacetime, using Tomita-Takesaki modular theory and the Araki …
scalar field in de Sitter spacetime, using Tomita-Takesaki modular theory and the Araki …
[HTML][HTML] From local nets to Euler elements
Various aspects of the geometric setting of Algebraic Quantum Field Theory (AQFT) models
related to representations of the Poincaré group can be studied for general Lie groups …
related to representations of the Poincaré group can be studied for general Lie groups …
Nets of standard subspaces on non-compactly causal symmetric spaces
Let G be a connected simple linear Lie group and H in G a symmetric subgroup such that the
corresponding symmetric space G/H is non-compactly causal. We show that any irreducible …
corresponding symmetric space G/H is non-compactly causal. We show that any irreducible …
Wedge domains in compactly causal symmetric spaces
Motivated by constructions in Algebraic Quantum Field Theory we introduce wedge domains
in compactly causal symmetric spaces, which includes in particular anti-de Sitter space in all …
in compactly causal symmetric spaces, which includes in particular anti-de Sitter space in all …
Relative Entropy of Fermion Excitation States on the CAR Algebra
S Galanda, A Much, R Verch - Mathematical Physics, Analysis and …, 2023 - Springer
The relative entropy of certain states on the algebra of canonical anticommutation relations
(CAR) is studied in the present work. The CAR algebra is used to describe fermionic …
(CAR) is studied in the present work. The CAR algebra is used to describe fermionic …
Modular structure of the Weyl algebra
R Longo - Communications in Mathematical Physics, 2022 - Springer
We study the modular Hamiltonian associated with a Gaussian state on the Weyl algebra.
We obtain necessary/sufficient criteria for the local equivalence of Gaussian states …
We obtain necessary/sufficient criteria for the local equivalence of Gaussian states …
Entropy-area law and temperature of de Sitter horizons from modular theory
We derive an entropy-area law for the future horizon of an observer in diamonds inside a
static patch of de Sitter space-time, taking into account the back reaction of quantum matter …
static patch of de Sitter space-time, taking into account the back reaction of quantum matter …
Wedge domains in non-compactly causal symmetric spaces
This article is part of an ongoing project aiming at the connections between causal structures
on homogeneous spaces, Algebraic Quantum Field Theory, modular theory of operator …
on homogeneous spaces, Algebraic Quantum Field Theory, modular theory of operator …
Bayesian inversion and the Tomita–Takesaki modular group
We show that conditional expectations, optimal hypotheses, disintegrations and adjoints of
unital completely positive maps are all instances of Bayesian inverses. We study the …
unital completely positive maps are all instances of Bayesian inverses. We study the …