Abstract
This letter investigates the time-machine problem in perfect fluid cosmologies. It solves the Einstein’s field equations with the energy-momentum tensors for perfect fluid and constructs a class of time-machine solutions, by which the time-machine problem in the perfect fluid cosmologies is solved.
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References
Ori A. A class of time-machine solutions with a compact vacuum core [J]. Physical Review Letters, 2005, 95(2): 021101.
Ori A. Formation of closed time-like curves in a composite vacuum/dust asymptotically-flat spacetime [J]. Physical Review D, 2007, 76(4): 044002.
Kong De-xing, Liu Ke-feng. Time-periodic solutions of the Einstein’s field equations [DB/OL]. (2008-05-22). http://arxiv.org/abs/0805.1100.
Kong De-xing, Liu Ke-feng, Shen Ming. Time-periodic solutions of the Einstein’s field equations II [DB/OL]. (2008-07-31). http://arxiv.org/abs/0807.4981.
Hawking S W, Ellis G F R. Large scale structure of spacetime [M]. United Kingdom: Cambridge University Press, 1975.
Bicak J, Kuchar K. Null dust in canonical gravity [J]. Physical Review D, 1997, 56: 4878–4895.
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Duan, Yz. Time-machine in perfect fluid cosmologies. J. Shanghai Jiaotong Univ. (Sci.) 14, 510–512 (2009). https://doi.org/10.1007/s12204-009-0510-8
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DOI: https://doi.org/10.1007/s12204-009-0510-8