Results 91 to 100 of about 281 (174)

Closed Timelike Curves Re-Examined

, 2004
Examples are given of the creation of closed timelike curves by choices of coordinate identifications. Following Gödel's prescription, it is seen that flat spacetime can produce closed timelike curves with structure similar to that of Gödel. In this context, coordinate identifications rather than exotic gravitational effects of general relativity are ...
Cooperstock, F. I., Tieu, S.
openaire   +2 more sources

Are Petrov type-N and D spacetimes admitting CTCs valid in $$f(R,\mathcal {L}_m,\Phi ,X)$$ f ( R , L m , Φ , X )  gravity?

European Physical Journal C: Particles and Fields
We ask whether two classical time-machine geometries, the Ori (2005) compact-vacuum-core metric and the Ahmed (2018) four-dimensional generalisation of Misner space, remain admissible exact solutions when the gravitational sector is enlarged to the ...
Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı   +2 more
doaj   +1 more source

Closed timelike curves in 𝒫𝒯-symmetric wormholes

International Journal of Modern Physics D
In this paper, we investigate a modified Einstein–Rosen wormhole model, made unidirectionally traversable through a bimetric geometry defined by two regular metrics, [Formula: see text] and [Formula: see text] and characterized by [Formula: see text] symmetry combining time reversal ([Formula: see text]) and spatial inversion ([Formula: see text]). In
openaire   +2 more sources

Hyperbolic angles in Lorentzian length spaces and timelike curvature bounds. [PDF]

J Lond Math Soc, 2023
Beran T, Sämann C.
europepmc   +1 more source

Null Distance and Convergence of Lorentzian Length Spaces. [PDF]

Ann Henri Poincare, 2022
Kunzinger M, Steinbauer R.
europepmc   +1 more source

The Singularity Theorems of General Relativity and Their Low Regularity Extensions. [PDF]

Jahresber Dtsch Math Ver, 2023
Steinbauer R.
europepmc   +1 more source

Closed timelike curves and causality violation

, 2010
19 pages, 6 figures. Invited chapter to appear in an edited collection 'Classical and Quantum Gravity: Theory, Analysis and Applications'
openaire   +2 more sources

A note on the Gannon-Lee theorem. [PDF]

Lett Math Phys, 2021
Schinnerl B, Steinbauer R.
europepmc   +1 more source

Exploration of a singular fluid spacetime. [PDF]

Gen Relativ Gravit, 2021
Remmen GN.
europepmc   +1 more source

Closed timelike curves in general relativity

, 2002
3 pages, PACS ...
openaire   +2 more sources