Results 31 to 40 of about 783,588 (168)
Annalen der Physik, Volume 538, Issue 6, June 2026.This study examines slowly rotating traversable wormholes supported by string fluids whose properties change with radius. The matter smoothly shifts from a de Sitter‐like core to a string‐dominated exterior, producing a regular, horizon‐free spacetime.
A. Errehymy +5 more
wiley +1 more source
Caustic points of the timelike curve on the de Sitter 3-space [PDF]
, 2021 In cosmology, de Sitter geometry is a model of an accelerated expansion of the universe. This geometry is obtained from the solution of the Einstein field equations with positive cosmological constant.
Ates, Fatma
core +1 more source
Fortschritte der Physik, Volume 74, Issue 6, June 2026.ABSTRACT We present a clear, step‐by‐step method for counting degrees of freedom and identifying constraints in general field theories. This approach, grounded in the works of Einstein, Hilbert, Cartan, Kuranishi, and, more recently, Seiler, is neither Lagrangian nor Hamiltonian in nature. Instead, it applies directly to the field equations. We offer a
Lavinia Heisenberg
wiley +1 more source
, 2015 In this paper, timelike parallel pi-equidistant ruled surfaces with a timelike base curve are defined and the shape operators, shape tensor, the qth fundamental forms and the characteristic polynomials of the shape tensors of these surfaces are obtained.
Masal, Melek +3 more
core +1 more source
Ringdown Modulation of Acceleration Radiation in the Schwarzschild Background
Fortschritte der Physik, Volume 74, Issue 6, June 2026.ABSTRACT We derive an analytic first‐order description of how Schwarzschild ringdown affects a detector‐based detailed‐balance diagnostic in a near‐horizon, single‐mode setting. A freely falling two‐level system couples to a cavity‐filtered outgoing mode of fixed asymptotic frequency, whose static Schwarzschild response gives geometric photon ...
Reggie C. Pantig
wiley +1 more source
Singularity Properties of Timelike Sweeping Surface in Minkowski 3-Space
, 2022 In this paper, we give the parametric equation of the Bishop frame for a timelike sweeping surface with a unit speed timelike curve in Minkowski 3-space.
Rashad A. Abdel-Baky +2 more
core +1 more source
Differential equations and integral characterizations of timelike and spacelike spherical curves in the Minkowski space-time $E_1^4$ [PDF]
Математичні Студії, 2013 In this paper we give differential equations characterizing timelike andspacelike curves lying on hyperbolic sphere $H_0^3 $ and Lorentzian sphere$S_1^3 $ in the Minkowski space-time $E_1^4 $.
H. H. Ugurlu, M. Onder, T. Kahraman
doaj
Deforming the Double‐Scaled SYK and Reaching the Stretched Horizon From Finite Cutoff Holography
Fortschritte der Physik, Volume 74, Issue 5, May 2026.ABSTRACT We study the properties of the double‐scaled SYK (DSSYK) model under chord Hamiltonian deformations based on finite cutoff holography for general dilaton gravity theories with Dirichlet boundaries. The formalism immediately incorporates a lower‐dimensional analog of TT¯(+Λ2)$\text{T}\overline{\text{T}}(+\Lambda _2)$ deformations, denoted T2 ...
Sergio E. Aguilar‐Gutierrez
wiley +1 more source
Position vectors of a timelike and a null helix in Minkowski 3-space [PDF]
, 2008 In this paper, we study the position vectors of a timelike and a null helix (or a W-curve), i.e. curve with constant curvatures in the Minkowski 3-space E-1(3). We give some characterizations for timelike and null helix whose image lies on the Lorentzian
Boyacioglu, Oezguer +3 more
core +1 more source
On Gauge‐Invariant Entire Function Regulators and UV Finiteness in Non Local Quantum Field Theory
Annalen der Physik, Volume 538, Issue 4, April 2026.We regulate the theory with an entire function of the covariant operator F(□/M∗2)$F(\square /M^{2}_{*})$. In the perturbative vacuum this becomes a momentum‐space factor F(−p2/M∗2)$F(-p^{2}/M^{2}_{*})$ that exponentially damps high momenta, most transparent after Wick rotation, rendering loop integrals UV finite.
J. W. Moffat, E. J. Thompson
wiley +1 more source