102 citations · 204 across the 19 of their papers we have counts for
6 papers · 1 filter
Relative entropy in quantum field theory: the case of squeezed fermions
Markus B. Fröb
We review the role of relative entropy in quantum field theories, where the local von Neumann algebras are generically of type III. Consequently, only few exact results are known,…
Bounding relative entropy for non-unitary excitations in quantum field theory
Markus B. Fröb, Leonardo Sangaletti
We show how one can use the convexity of non-commutative norms to bound the relative entropy between a faithful state on a von Neumann algebra and an arbitrary excitation the…
A proposal for the algebra of a novel noncommutative spacetime
Markus B. Fröb, Albert Much, Kyriakos Papadopoulos
We investigate the quantum structure of spacetime at fundamental scales via a novel, Lorentz-invariant noncommutative coordinate framework. Building on insights from noncommutative…
Relating the modular Hamiltonian to two-point functions
Markus B. Fröb
We consider the modular Hamiltonian associated to standard subspaces for a free scalar field in a globally hyperbolic spacetime in an arbitrary Gaussian state. We show how the modu…
Modular Hamiltonian and modular flow of massless fermions on a cylinder
Daniela Cadamuro, Markus B. Fröb, Guillem Pérez-Nadal
We determine explicitly the modular flow and the modular Hamiltonian for massless free fermions in diamonds on a cylinder in 1+1 dimensions. We consider both periodic and antiperio…
A quantum energy inequality in the Sine--Gordon model
Markus B. Fröb, Daniela Cadamuro
We consider the stress tensor in the massless Sine--Gordon model in the finite regime of the theory. We prove convergence of the renormalised perturbative series for th…