Accelerating cosmologies from compactification with a twist (2005)
AuthorsNeupane, I.P., Wiltshire, D.L.show all
It is demonstrated by explicit solutions of the 4+n–dimensional vacuum Einstein equations that accelerating cosmologies in the Einstein conformal frame can be obtained by a time–dependent compactification of string/M–theory, even in the case that internal dimensions are Ricci–flat, provided one includes one or more geometric twists. Such acceleration is transient. When both compact hyperbolic internal spaces and geometric twists are included, however, the period of accelerated expansion may be made arbitrarily large.
CitationNeupane, I.P., Wiltshire, D.L. (2005) Accelerating cosmologies from compactification with a twist. Physics Letters B, 619(3-4), pp. 201-207.
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ANZSRC Fields of Research02 - Physical Sciences::0201 - Astronomical and Space Sciences::020103 - Cosmology and Extragalactic Astronomy
02 - Physical Sciences::0201 - Astronomical and Space Sciences::020106 - High Energy Astrophysics; Cosmic Rays
02 - Physical Sciences::0201 - Astronomical and Space Sciences::020105 - General Relativity and Gravitational Waves