Results 11 to 20 of about 222 (175)

Quantum avoidance of Gödel’s closed timelike curves

European Physical Journal C: Particles and Fields, 2023
In a large class of nonlocal as well as local higher derivative theories minimally coupled to the matter sector, we investigate the exactness of two different classes of homogeneous Gödel-type solutions, which may or may not allow closed time-like curves
Zhe Zhao, Leonardo Modesto
doaj   +4 more sources

Localized Closed Timelike Curves Can Perfectly Distinguish Quantum States [PDF]

Physical Review Letters, 2009
4.1 pages, 2 figures; v2: revised title, abstract, introduction and conclusion, plus added ...
Brun, Todd A., Harrington, Jim, Wilde, Mark M.   +2 more
openaire   +5 more sources

On the Counter-Rotation of Closed Time-like Curves

Universe, 2022
While it is tempting to think of closed time-like curves (CTCs) around rotating bodies, such as a black hole, as being “caused” by the rotation of the source, Andréka et al.
Yuanyuan Duan, Fangxun Liu, Yu Wang, Yen Chin Ong   +3 more
doaj   +1 more source

Closed timelike curves and energy conditions in regular spacetimes

European Physical Journal C: Particles and Fields, 2022
In this article, we explore the relationship between the existence of closed timelike curves and energy conditions that occur in the Kerr–Newman spacetime.
Sashideep Gutti, Shailesh Kulkarni, Vaishak Prasad   +2 more
doaj   +1 more source

Closed Timelike Curves Induced by a Buchdahl-Inspired Vacuum Spacetime in ${\mathcal{R}}^{\mathbf{2}}$ Gravity

Universe, 2023
The recently obtained special Buchdahl-inspired metric Phys. Rev. D 107, 104008 (2023) describes asymptotically flat spacetimes in pure Ricci-squared gravity.
Hoang Ky Nguyen, Francisco S. N. Lobo
doaj   +1 more source

Simulations of Closed Timelike Curves [PDF]

Foundations of Physics, 2017
Proposed models of closed timelike curves (CTCs) have been shown to enable powerful information-processing protocols. We examine the simulation of models of CTCs both by other models of CTCs and by physical systems without access to CTCs. We prove that the recently proposed transition probability CTCs (T-CTCs) are physically equivalent to postselection
Todd A. Brun, Mark M. Wilde
openaire   +3 more sources

A Causality Preserving Evolution of a Pair of Strings

Universe, 2022
As follows from Gott’s discovery, a pair of straight string-like singularities moving in opposite directions, when they have suitable speed and impact parameter, produce closed timelike curves.
Serguei Krasnikov
doaj   +1 more source

CLOSED TIMELIKE CURVES IN RELATIVISTIC COMPUTATION [PDF]

Parallel Processing Letters, 2012
In this paper, we investigate the possibility of using closed timelike curves (CTCs) in relativistic hypercomputation. We introduce a wormhole based hypercomputation scenario which is free of the common worries, such as the blueshift problem. We also discuss the physical reasonability of our scenario, and why we cannot simply ignore the possibility of ...
Andréka, Hajnal, Németi, István, Székely, Gergely   +2 more
openaire   +3 more sources

Simulation of Closed Timelike Curves in a Darwinian Approach to Quantum Mechanics

Universe, 2023
Closed timelike curves (CTCs) are non-intuitive theoretical solutions of general relativity field equations. The main paradox associated with the physical existence of CTCs, the so-called grandfather paradox, can be satisfactorily solved by a quantum ...
Carlos Baladrón, Andrei Khrennikov
doaj   +1 more source

Experimental simulation of closed timelike curves [PDF]

Nature Communications, 2014
9 pages, 8 ...
Ringbauer, Martin, Broome, Matthew A., Myers, Casey R., White, Andrew G., Ralph, Timothy C.   +4 more
openaire   +4 more sources