Accelerating cosmologies and a phase transition in M theory
Apr, 20039 pages
Published in:
- Phys.Lett.B 563 (2003) 1
e-Print:
- hep-th/0304089 [hep-th]
Report number:
- DAMTP-2003-29
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Abstract:
M-theory compactifies on a seven-dimensional time-dependent hyperbolic or flat space to a four-dimensional FLRW cosmology undergoing a period of accelerated expansion in Einstein conformal frame. The strong energy condition is violated by the scalar fields produced in the compactification, as is necessary to evade the no-go theorem for time-independent compactifications. The four-form field strength of eleven-dimensional supergravity smoothly switches on during the period of accelerated expansion in hyperbolic compactifications, whereas in flat compactifications, the three-form potential smoothly changes its sign. For small acceleration times, this behaviour is like a phase transition of the three-form potential, during which the cosmological scale factor approximately doubles.Note:
- 10 pages, 4 figures, REVTeX4, some references added Report-no: DAMTP-2003-29 Journal-ref: Phys. Lett. B 563 (2003) 1.
- 11.25.Yb
- 98.80.Jk
- 04.50.+h
- M-theory
- critical phenomena
- dimension: 11
- compactification
- space-time: acceleration
- supergravity
- differential forms
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