Closed timelike curves in asymmetrically warped brane universes

Journal Article · Sat Aug 15 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.044008· OSTI ID:21322467

Paes, Heinrich ^[1]; Pakvasa, Sandip ^[2]; Dent, James; Weiler, Thomas J ^[3]

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1. Fakutaet fuer Physik, Technische Universitaet Dortmund, D-44221 Dortmund (Germany)
2. Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Road, Honolulu, Hawaii 96822 (United States)
3. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)

In asymmetrically-warped spacetimes different warp factors are assigned to space and to time. We discuss causality properties of these warped brane universes and argue that scenarios with two extra dimensions may allow for timelike curves which can be closed via paths in the extra-dimensional bulk. In particular, necessary and sufficient conditions on the metric for the existence of closed timelike curves are presented. We find a six-dimensional warped metric which satisfies the CTC conditions, and where the null, weak and dominant energy conditions are satisfied on the brane (although only the former remains satisfied in the bulk). Such scenarios are interesting, since they open the possibility of experimentally testing the chronology protection conjecture by manipulating on our brane initial conditions of gravitons or hypothetical gauge-singlet fermions (''sterile neutrinos'') which then propagate in the extra dimensions.

• OSTI ID: 21322467
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CAUSALITY
GRAVITONS
METRICS
NEUTRINOS
SPACE-TIME
UNIVERSE