Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Victor E. Ambruş"'
Autor:
Victor E. Ambrus, Elizabeth Winstanley
Publikováno v:
Symmetry, Vol 13, Iss 11, p 2019 (2021)
Here, we study a quantum fermion field in rigid rotation at finite temperature on anti-de Sitter space. We assume that the rotation rate Ω is smaller than the inverse radius of curvature ℓ−1, so that there is no speed of light surface and the st
Externí odkaz:
https://doaj.org/article/0bd05d8aef64465b99f65f649eb0521d
Publikováno v:
Physics Letters B, Vol 749, Iss C, Pp 597-602 (2015)
The Schwinger–de Witt and Hadamard methods are used to obtain renormalised vacuum expectation values for the fermion condensate, charge current and stress-energy tensor of a quantum fermion field of arbitrary mass on four-dimensional anti-de Sitter
Externí odkaz:
https://doaj.org/article/65e34aad83c244b8928dad4809dea645
Autor:
Victor E. Ambruş, Maxim N. Chernodub
Publikováno v:
Physics Letters B, Vol 855, Iss , Pp 138757- (2024)
We discuss the imaginary-time formalism for field theories in thermal equilibrium in uniformly accelerating frames. We show that under a Wick rotation of Minkowski spacetime, the Rindler event horizon shrinks to a point in a two-dimensional subspace
Externí odkaz:
https://doaj.org/article/eb06016234e54e339e80309c3987b050
Autor:
Victor E. Ambruş, Etele Molnár
Publikováno v:
Physics Letters B, Vol 855, Iss , Pp 138795- (2024)
We present a relativistic Shakhov-type generalization of the Anderson-Witting relaxation time model for the Boltzmann collision integral to modify the ratio of momentum diffusivity to thermal diffusivity. This is achieved by modifying the path on whi
Externí odkaz:
https://doaj.org/article/a1a1f8077cfe494392efc1bf0eb05b08
Autor:
Victor E. Ambruş, Maxim N. Chernodub
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-19 (2024)
Abstract An ensemble of massless fermions can be characterized by its total helicity charge given by the sum of axial charges of particles minus the sum of axial charges of antiparticles. We show that charged massless fermions develop a dissipationle
Externí odkaz:
https://doaj.org/article/172fab4efd11406bb4c6e08416250cd8
Autor:
Victor E. Ambruş
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 8, Pp 1-68 (2020)
Abstract The properties of a massive fermion field undergoing rigid rotation at finite temperature and chemical potential are discussed. The polarisation imbalance is taken into account by considering a helicity chemical potential, which is dual to t
Externí odkaz:
https://doaj.org/article/4e3ac63b06a84e07b300f252cf01b433
Autor:
Victor E. Ambruş
Publikováno v:
Physics Letters B, Vol 771, Iss , Pp 151-156 (2017)
Based on known analytic results, the thermal expectation value of the stress-energy tensor (SET) operator for the massless Dirac field is analysed from a hydrodynamic perspective. Key to this analysis is the Landau decomposition of the SET, with the
Externí odkaz:
https://doaj.org/article/5a3d038f133641d09d10a88894addbe1
Publikováno v:
Physical Review
We evaluate the full opacity dependence of collective flow in high-energy heavy-ion collisions within a microscopic kinetic description based on the Boltzmann equation in the conformal relaxation time approximation. By comparing kinetic theory calcul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb5f2792e43f577a94502d6dcee278ca
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Publikováno v:
Physical Review Letters
We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description in the conformal relaxation time approximation, in order to determine the range of applicability of an effective description in relativistic visc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2b9caec44768227eff71b1bb2005c08
https://doi.org/10.1103/physrevlett.130.152301
https://doi.org/10.1103/physrevlett.130.152301
Publikováno v:
Physical Review D. 106
We derive the transport coefficients of second-order fluid dynamics with $14$ dynamical moments using the method of moments and the Chapman-Enskog method in the relaxation-time approximation for the collision integral of the relativistic Boltzmann eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf0a1a9e529277a741525d439709a909
https://doi.org/10.1103/physrevd.106.076005
https://doi.org/10.1103/physrevd.106.076005