Zobrazeno 1 - 10
of 510
pro vyhledávání: '"Oeckl P"'
Autor:
Oeckl, Robert
We construct the spectral decomposition of field operators in bosonic quantum field theory as a limit of a strongly continuous family of POVM decompositions. The latter arise from integrals over families of bounded positive operators. Crucially, thes
Externí odkaz:
http://arxiv.org/abs/2409.08748
Autor:
Colosi, Daniele, Oeckl, Robert
The Newton-Wigner states and operator are widely accepted to provide an adequate notion of spatial localization of a particle in quantum field theory on a spacelike hypersurface. Replacing the spacelike with a timelike hypersurface, we construct one-
Externí odkaz:
http://arxiv.org/abs/2407.08841
Publikováno v:
Phys. Rev. D 109 (2024) 025009, 27 pages
We demonstrate that the recently introduced evanescent particles of a massive scalar field can be emitted and absorbed by an Unruh-DeWitt detector. In doing so the particles carry away from or deposit on the detector a quantized amount of energy, in
Externí odkaz:
http://arxiv.org/abs/2310.06716
Autor:
Oeckl, Robert, Almada, Juan Orendain
Publikováno v:
J. Math. Phys. 65, 012301 (2024)
We introduce Compositional Quantum Field Theory (CQFT) as an axiomatic model of Quantum Field Theory, based on the principles of locality and compositionality. Our model is a refinement of the axioms of General Boundary Quantum Field Theory, and is p
Externí odkaz:
http://arxiv.org/abs/2208.10385
Autor:
Lorenzo Barba, Christoph Vollmuth, Samir Abu-Rumeileh, Steffen Halbgebauer, Patrick Oeckl, Petra Steinacker, Alexander M. Kollikowski, Cara Schultz, Judith Wolf, Mirko Pham, Michael K. Schuhmann, Peter U. Heuschmann, Karl Georg Haeusler, Guido Stoll, Hermann Neugebauer, Markus Otto
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-7 (2023)
Abstract We aimed to assess the prognostic value of serum β-synuclein (β-syn), neurofilament light chain (NfL) and glial fibrillary acidic protein (GFAP) in patients with moderate-to-severe acute ischemic stroke. We measured β-syn, GFAP and NfL in
Externí odkaz:
https://doaj.org/article/e4b568f07c824155bc3dfb236de0636a
Autor:
Oeckl, Robert
Publikováno v:
Int. J. Mod. Phys. A 38 (2023) 2350081, 25 pages
Massive Klein-Gordon theory is quantized on the timelike hypercylinder in Minkowski space. Crucially, not only the propagating, but also the evanescent sector of phase space is included, laying in this way foundations for a quantum scattering theory
Externí odkaz:
http://arxiv.org/abs/2105.07600
Autor:
Samir Abu‐Rumeileh, Lorenzo Barba, Matthias Bache, Steffen Halbgebauer, Patrick Oeckl, Petra Steinacker, Antje Güttler, Jacqueline Keßler, Jörg Illert, Christian Strauss, Dirk Vordermark, Markus Otto
Publikováno v:
Annals of Clinical and Translational Neurology, Vol 10, Iss 10, Pp 1924-1930 (2023)
Abstract We analyzed the longitudinal concentrations and prognostic roles of plasma β‐synuclein (β‐syn), glial fibrillary acidic protein (GFAP), and neurofilament proteins (NfL and NfH) in 33 patients with malignant gliomas, who underwent surgi
Externí odkaz:
https://doaj.org/article/1956c4b3dba54c47bf40b37baa7ca0b4
Autor:
Samir Abu‐Rumeileh, Steffen Halbgebauer, Giuseppe Mario Bentivenga, Lorenzo Barba, Simone Baiardi, Andrea Mastrangelo, Patrick Oeckl, Petra Steinacker, Angela Mammana, Sabina Capellari, Markus Otto, Piero Parchi
Publikováno v:
Annals of Clinical and Translational Neurology, Vol 10, Iss 10, Pp 1904-1909 (2023)
ABSTRACT Beta‐synuclein is a promising cerebrospinal fluid and blood biomarker of synaptic damage. Here we analysed its accuracy in the discrimination between sporadic Creutzfeldt–Jakob disease (n = 150) and non‐prion rapidly progressive dement
Externí odkaz:
https://doaj.org/article/52a33a1818cf4c2bb6da062a254fc2c1
Autor:
Colosi, Daniele, Oeckl, Robert
Publikováno v:
Int. J. Mod. Phys. A 36 (2021) 2150194, 23 pages
Massive Klein-Gordon theory is quantized on a timelike hyperplane in Minkowski space using the framework of general boundary quantum field theory. In contrast to previous work, not only the propagating sector of the phase space is quantized, but also
Externí odkaz:
http://arxiv.org/abs/2104.12321
Autor:
Colosi, Daniele, Oeckl, Robert
Publikováno v:
SIGMA 17 (2021), 073, 83 pages
We extend the framework of general boundary quantum field theory (GBQFT) to achieve a fully local description of realistic quantum field theories. This requires the quantization of non-K\"ahler polarizations which occur generically on timelike hypers
Externí odkaz:
http://arxiv.org/abs/2009.12342