Vacuum Interaction of Crossed Cosmic Strings
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In this paper, we consider the vacuum energy of a scalar field in the spacetime of two non-parallel cosmic strings. To this end, we obtain metrics for orthogonal straight cosmic strings and for slightly nonparallel strings. In the first case, we derive the separation-dependent part of the vacuum energy in the leading order of string tension. The dependence of the vacuum energy on separation differs from that known for parallel strings. For two strings inclined at a small angle to each other, the approximation used simply reproduces the result for parallel strings, since the angle dependence enters the next to leading order. The results are compared with the Casimir interaction between two inclined cylinders.
2016 ◽
Vol 25
(09)
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pp. 1641018
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1985 ◽
Vol 43
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pp. 78-79
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Searching for gravitational-wave bursts from cosmic string cusps with the Parkes Pulsar Timing Array
2020 ◽
Vol 501
(1)
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pp. 701-712
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2019 ◽
Vol 28
(01)
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pp. 1950022
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2004 ◽
Vol 19
(02)
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pp. 111-116
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1999 ◽
Vol 14
(12)
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pp. 1953-1974
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1992 ◽
Vol 07
(27)
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pp. 2463-2467
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