Results 31 to 40 of about 281 (174)
Nonlinearity in quantum theory and closed timelike curves [PDF]
Physical Review D, 1995 17 pages plain TeX, DAMTP R/94 ...
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Unitarity restoration in the presence of closed timelike curves [PDF]
Physical Review D, 1995 LaTeX, 17pp, Revisions: Title change, expanded and clarified presentation of original proposal, esp.
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Discriminating Quantum States in the Presence of a Deutschian CTC: A Simulation Analysis
IEEE Transactions on Quantum Engineering, 2022 In an article published in 2009, Brun et al. proved that in the presence of a “Deutschian” closed timelike curve, one can map $K$ distinct nonorthogonal states (hereafter, input set) to the standard orthonormal basis of a $K$-dimensional ...
Leonardo Bacciottini +3 more
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Unitarity with Closed Timelike Curves [PDF]
Journal of Physics: Conference Series, 2006 We conjecture that, in certain cases, quantum dynamics is consistent in the presence of closed timelike curves. We consider time dependent orbifolds of three dimensional Minkowski space describing, in the limit of large AdS radius, BTZ black holes inside the horizon.
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Cauchy problem in spacetimes with closed timelike curves [PDF]
Physical Review D, 1990 The laws of physics might permit the existence, in the real Universe, of closed timelike curves (CTC’s). Macroscopic CTC’s might be a semiclassical consequence of Planck-scale, quantum gravitational, Lorentzian foam, if such foam exists. If CTC’s are permitted, then the semiclassical laws of physics (the laws with gravity classical and other fields ...
Friedman, John +6 more
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Philosophy and Phenomenological Research, Volume 113, Issue 1, Page 134-152, July 2026.ABSTRACT Determinism is (roughly) the thesis that the past determines the future. But efforts to define it precisely have exposed deep methodological disagreements. Standard possible‐worlds formulations of determinism presuppose an “agreement” relation between worlds, but this relation can be understood in multiple ways, none of which is particularly ...
Hans Halvorson +2 more
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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
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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
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The Timelike Tube Theorem in Curved Spacetime
Communications in Mathematical PhysicsThe timelike tube theorem asserts that in quantum field theory without gravity, the algebra of observables in an open set U is the same as the corresponding algebra of observables in its ``timelike envelope'' E(U), which is an open set that is in general larger. The theorem was originally proved in the 1960's by Borchers and Araki for quantum fields in
Alexander Strohmaier, Edward Witten
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On Pseudospherical Smarandache Curves in Minkowski 3-Space
Journal of Applied Mathematics, 2014 In this paper we define nonnull and null pseudospherical Smarandache curves according to the Sabban frame of a spacelike curve lying on pseudosphere in Minkowski 3-space. We obtain the geodesic curvature and the expressions for the Sabban frame’s vectors
Esra Betul Koc Ozturk +3 more
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