Zobrazeno 1 - 10
of 168
pro vyhledávání: '"Verch, Rainer"'
Autor:
Dorau, Philipp, Verch, Rainer
Publikováno v:
Class. Quantum Grav. 41 145008 (2024)
We extend the concept of the Kodama symmetry, a quasi-local time translation symmetry for dynamical spherically symmetric spacetimes, to a specific class of dynamical axisymmetric spacetimes, namely the families of Kerr-Vaidya and Kerr-Vaidya-de Sitt
Externí odkaz:
http://arxiv.org/abs/2402.18993
Autor:
Passegger, Albert Georg, Verch, Rainer
For any local, translation-covariant quantum field theory on Minkowski spacetime we prove that two distinct primary states that are invariant under the inertial time evolutions in different inertial reference frames and satisfy a timelike cluster pro
Externí odkaz:
http://arxiv.org/abs/2402.14794
Autor:
Much, Albert, Verch, Rainer
Publikováno v:
Universe 2023, 9(10), 447
It is known that in quantum field theory, localized operations, e.g.\ given by unitary operators in local observable algebras, may lead to non-causal, or superluminal, state changes within their localization region. In this article, it is shown that
Externí odkaz:
http://arxiv.org/abs/2308.16673
Publikováno v:
Mathematical Physics, Analysis and Geometry 26, 21 (2023)
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 degrees of freedom in quantum mechanics and quantum field theory. The sta
Externí odkaz:
http://arxiv.org/abs/2305.02788
Autor:
Fewster, Christopher J., Verch, Rainer
The topic of measurement in relativistic quantum field theory is addressed in this article. Some of the long standing problems of this subject are highlighted, including the incompatibility of an instantaneous ``collapse of the wavefunction'' with re
Externí odkaz:
http://arxiv.org/abs/2304.13356
For every local quantum field theory on a static, globally hyperbolic spacetime of arbitrary dimension, assuming the Reeh-Schlieder property, local preparability of states, and the existence of an energy density as operator-valued distribution, we pr
Externí odkaz:
http://arxiv.org/abs/2210.01145
Autor:
Janssen, Daan W., Verch, Rainer
We investigate quasi-free Hadamard states defined via characteristic initial data on null cones centred at the axis of symmetry in spherically symmetric space-times. We characterize the necessary singular behaviour of null boundary two-point function
Externí odkaz:
http://arxiv.org/abs/2209.00577
Publikováno v:
Letters in Mathematical Physics 111 (2021) No 110 (open access)
We consider spherically symmetric spacetimes with an outer trapping horizon. Such spacetimes are generalizations of spherically symmetric black hole spacetimes where the central mass can vary with time, like in black hole collapse or black hole evapo
Externí odkaz:
http://arxiv.org/abs/2102.11547
Autor:
Tolksdorf, Jürgen, Verch, Rainer
Publikováno v:
Foundations of Physics 51, no 93 (2021) (open access)
The D-CTC condition, introduced by David Deutsch as a condition to be fulfilled by analogues for processes of quantum systems in the presence of closed timelike curves, is investigated for classical statistical (non-quantum) bi-partite systems. It is
Externí odkaz:
http://arxiv.org/abs/1912.02301
Autor:
Verch, Rainer
A condition proposed by David Deutsch to describe analogues of processes in the presence of closed timelike curves (D-CTC condition) in bipartite quantum systems is investigated within the framework of local relativistic quantum field theory. The mai
Externí odkaz:
http://arxiv.org/abs/1904.02747