Results 71 to 80 of about 281 (174)
Axion‐Like Interactions and CFT in Topological Matter, Anomaly Sum Rules and the Faraday Effect
Advanced Physics Research, Volume 4, Issue 7, July 2025.This review investigates the connection between chiral anomalies and their manifestation in topological materials, using both perturbative methods based on ordinary quantum field theory and conformal field theory (CFT). It emphasizes the role of CFT in momentum space for parity‐odd correlation functions, and their reconstruction by the inclusion of a ...
Claudio Corianò +4 more
wiley +1 more source
Stability of closed timelike curves in the Gödel universe
General Relativity and Gravitation, 2007 We study, in some detail, the linear stability of closed timelike curves in the Goedel metric. We show that these curves are stable. We present a simple extension (deformation) of the Goedel metric that contains a class of closed timelike curves similar to the ones associated to the original Goedel metric.
Rosa, Valéria M., Letelier, Patricio S.
openaire +3 more sources
Dynamics of geodesics around the Bardeen-AdS black hole immersed in quintessence
Results in PhysicsThis paper investigates the dynamics of the timelike and null geodesics near the Bardeen-AdS black hole immersed in quintessence. Specifically, the equation of geodesic motion is derived by solving the Hamilton–Jacobi equation of the test particles ...
Ruifang Wang, Fabao Gao, Jianwen Liu
doaj +1 more source
On totally umbilical and minimal surfaces of the Lorentzian Heisenberg groups
Mathematische Nachrichten, Volume 298, Issue 6, Page 1922-1942, June 2025.Abstract This paper has manifold purposes. We first introduce a description of the Gauss map for submanifolds (both spacelike and timelike) of a Lorentzian ambient space and relate the conformality of the Gauss map of a surface to total umbilicity and minimality.
Giovanni Calvaruso +2 more
wiley +1 more source
Ruled Surfaces with Constant Slope Ruling According to Darboux Frame in Minkowski Space
International Journal of Analysis and Applications, 2020 In this study, three different types of ruled surfaces are defined. The generating lines of these ruled surfaces are given by points on a curve X in Minkowski Space, while the position vector of X have constant slope with respect to the planes (t, y), (t,
Ayşe Yavuz, Yusuf Yayli
doaj
Fortschritte der Physik, Volume 73, Issue 4, April 2025.Abstract The Kerr metric is a vacuum solution of the Einstein equations outside of a rotating black hole (BH), but what interior matter is actually rotating and sourcing the Kerr geometry? Here, a rotating exotic matter is described, which can source the Kerr geometry for the entire acceptable range of its spin parameter and be shown to saturate the ...
Ram Brustein, A.J.M. Medved
wiley +1 more source
Osculating Mate of a Curve in Minkowski 3-Space
AxiomsIn this paper, we introduce and develop the concept of osculating curve pairs in the three-dimensional Minkowski space. By defining a vector lying in the intersection of osculating planes of two non-lightlike curves, we characterize osculating mates ...
İskender Öztürk +2 more
doaj +1 more source
Stationary‐Angle Conditions and Bertrand Offsets in Timelike‐Ruled Surfaces
Advances in Mathematical Physics, Volume 2025, Issue 1, 2025.In this study, we introduce the concept of stationary‐angle timelike‐ruled surfaces and examine their geometric properties, particularly in relation to their Bertrand offsets. A timelike‐ruled surface is generated by the motion of a straight ruling along a striction curve, and its structure is analyzed using the Blaschke and Darboux frames.
Areej A. Almoneef +2 more
wiley +1 more source
Generalized Bertrand curves with timelike (1,3)-normal plane in Minkowski space-time
Kuwait Journal of Science, 2015 In this paper, we reconsider the (1,3)-Bertrand curves with respect to the casualcharacters of (1,3)-normal plane which is a plane spanned by the principal normal andthe second binormal vector fields of the given curve.
ALİ UCUM +2 more
doaj