Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Chronology protection conjecture"'
Autor:
Effingham, Nikk, author
Publikováno v:
Time Travel : Probability and Impossibility, 2020.
Externí odkaz:
https://doi.org/10.1093/oso/9780198842507.003.0009
Autor:
Wen-Xiang Chen
The cosmic censorship hypothesis has not been directly verifified, and some physicists also questionthe validity of the cosmological censorship hypothesis. Through theoretical prediction, it pointedout that the existence of naked singularities is pos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ff7f8e6d3525eb18ff2d79f1a7f12e7
Closed timelike curves are among the most controversial features of modern physics. As legitimate solutions to Einstein's field equations, they allow for time travel, which instinctively seems paradoxical. However, in the quantum regime these paradox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb159d2890edba75b425a7821629f0d7
Autor:
Luis J. Garay, Pedro F. González-Díaz
Publikováno v:
General Relativity and Gravitation. 33:353-361
We review different spacetimes that contain nonchronal regions separated from the causal regions by chronology horizons and investigate their connection with some important aspects one would expect to be present in a final theory of quantum gravity,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b2518392bf98c989782750a6e5f4ac1
https://doi.org/10.1023/a:1002709503156
https://doi.org/10.1023/a:1002709503156
Autor:
M J Cassidy
Publikováno v:
Classical and Quantum Gravity. 15:2257-2260
In this paper, we consider gravity coupled to N scalar fields in the large-N limit. Misner space is considered as an axisymmetric Bianchi I universe and it is assumed that near the horizon, the periodic identification in the x-direction provides the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::088b8e6bd53bc8276b487b04615df24b
https://doi.org/10.1088/0264-9381/15/8/009
https://doi.org/10.1088/0264-9381/15/8/009
Autor:
S V Sushkov
Publikováno v:
Classical and Quantum Gravity. 12:1685-1697
It is considered the quantum complex scalar field which obeys the authomorphic condition in the two-dimensional spacetime with closed timelike curves and the chronology horizon. The renormalized stress-energy tensor is obtained. It is shown that the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45e35d6d8a631cdfe7e52d92ae733950
https://doi.org/10.1088/0264-9381/12/7/010
https://doi.org/10.1088/0264-9381/12/7/010
Autor:
James F. Woodward
Publikováno v:
Foundations of Physics Letters. 8:1-39
The study of the hypothetical activities of arbitrarily advanced cultures, particularly in the area of space and time travel, as a means of investigating fundamental issues in physics is briefly discussed. Hawking's chronology protection conjecture a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20429f0e587be409289bc41289000695
https://doi.org/10.1007/bf02187529
https://doi.org/10.1007/bf02187529
Autor:
Matt Visser
Publikováno v:
Physical Review D. 49:3963-3980
Calculating the van Vleck determinant in traversable wormhole spacetimes is an important ingredient in understanding the physical basis behind Hawking's chronology protection conjecture. This paper presents extensive computations of this object --- a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bc83e6869817d3f52973b37ae25d1b2
https://doi.org/10.1103/physrevd.49.3963
https://doi.org/10.1103/physrevd.49.3963
Autor:
Maxim Lyutikov
Publikováno v:
Physical Review D. 49:4041-4048
Hawking has speculated that his chronology protection conjecture is always enforced, i.e., closed timelike curves (CTC's) are always prevented from forming, by a divergent vacuum polarization of quantum fields at any chronology horizon where the CTC'
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e481db6e13f4f69b55e00be48610da7
https://doi.org/10.1103/physrevd.49.4041
https://doi.org/10.1103/physrevd.49.4041
Autor:
Takashi Mishima, Akika Nakamichi
Publikováno v:
Physical Review D. 49:R595-R598
The global structure of 1 + 1 dimensional compact Universe is studied in two-dimensional model of dilaton gravity. First we give a classical solution corresponding to the spacetime in which a closed time-like curve appears, and show the instability o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfc2f6bd8089b31562d01f6774eb2f8f
https://doi.org/10.1103/physrevd.49.r595
https://doi.org/10.1103/physrevd.49.r595