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Cho, Yongmin
School of Natural Science
Research Interests
  • Higher-dimensional Unified Field Theory

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Vacuum tunneling in gravity

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Title
Vacuum tunneling in gravity
Author
Cho, YongminPak, D. G.
Keywords
GRAVITATIONAL FIELD; GAUGE-THEORY; SYMMETRY; TOPOLOGY
Issue Date
2011-08
Publisher
IOP PUBLISHING LTD
Citation
CLASSICAL AND QUANTUM GRAVITY, v.28, no.15, pp. -
Abstract
Topologically non-trivial vacuum structures in gravity models with Cartan variables (vielbein and contortion) are considered. We study the possibility of vacuum spacetime tunneling in Einstein gravity assuming that the vielbein may play a fundamental role in quantum gravitational phenomena. It has been shown that in the case of RP(3) space topology, the tunneling between non-trivial topological vacuums can be realized by means of Eguchi-Hanson gravitational instanton. In the Riemann-Cartan geometric approach to quantum gravity, the vacuum tunneling can be provided by means of contortion quantum fluctuations. We define a double self-duality condition for the contortion and give explicit self-dual configurations which can contribute to vacuum tunneling amplitude.
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DOI
10.1088/0264-9381/28/15/155008
ISSN
0264-9381
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ECE_Journal Papers
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