Results 101 to 110 of about 13,955 (195)
Generation of closed timelike curves with rotating superconductors [PDF]
Classical and Quantum Gravity, 2007 9 pages.
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CLOSED TIMELIKE CURVES IN CLASSICAL RELATIVITY [PDF]
International Journal of Modern Physics D, 2003 Spacetimes of general relativity containing closed timelike curves (CTC) are usually dismissed as non-physical. However, it is now known that CTC may appear in spacetimes modelling simple laboratory experiments, and two such experiments are described in this essay. We therefore need a realistic interpretation of CTC. I suggest that a region containing
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Negative Branes, Supergroups and the Signature of Spacetime
, 2016 We study the realization of supergroup gauge theories using negative branes in string theory. We show that negative branes are intimately connected with the possibility of timelike compactification and exotic spacetime signatures previously studied by ...
Dijkgraaf, Robbert +3 more
core
Killing spectroscopy of closed timelike curves
Journal of High Energy Physics, 2004 1+35 pages, no figures; v2, new references added.
Maoz, L., Simon, J.
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Closed timelike curves in š¯’«š¯’Æ-symmetric wormholes
International Journal of Modern Physics DIn this paper, we investigate a modified Einsteinā€“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
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Timelike surfaces with Bertrand geodesic curves in Minkowski 3ā€“space
AIP AdvancesGeodesic curves on a surface play an essential role in reasonable implementation. A curve on a surface is a geodesic curve if its principal normal vector is aligned with the surface normal. Using the Serretā€“Frenet frame, the timelike (TL) surfaces can be
A. A. Almoneef, R. A. Abdel-Baky
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Computability Theory of Closed Timelike Curves
, 2016 We ask, and answer, the question of what's computable by Turing machines equipped with time travel into the past: that is, closed timelike curves or CTCs (with no bound on their size). We focus on a model for CTCs due to Deutsch, which imposes a probabilistic consistency condition to avoid grandfather paradoxes.
Aaronson, Scott +2 more
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Pseudo-timelike loops in signature changing semi-Riemannian manifolds with a transverse radical
Results in PhysicsIn 1983, Hartle and Hawking proposed the no-boundary proposal, suggesting that the universe has no beginning in the sense of a spacetime singularity or boundary. Nevertheless, there is an origin of time.
N.E. Rieger, W. Hasse
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MathematicsThis study investigates the geometry of osculating type-2 ruled surfaces in Minkowski 3-space E13, formulated through the Type-2 Bishop frame associated with a spacelike curve whose principal normal is timelike and binormal is spacelike.
Mohammed Messaoudi +4 more
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