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APS » Journals » Phys. Rev. D » Volume 72 » Issue 4
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Phys. Rev. D 72, 043531 (2005) [8 pages]

Smooth dynamical crossing of the phantom divide line of a scalar field in simple cosmological models

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Alexander A. Andrianov1,2, Francesco Cannata1, and Alexander Y. Kamenshchik1,3
1Dipartimento di Fisica and INFN, Via Irnerio 46,40126 Bologna, Italy
2V. A. Fock Department of Theoretical Physics, Saint Petersburg State University, 198904, Saint Petersburg, Russia
3L. D. Landau Institute for Theoretical Physics of the Russian Academy of Sciences, Kosygin str. 2, 119334 Moscow, Russia

Received 18 May 2005; published 30 August 2005

Simple scalar field cosmological models are considered describing gravity assisted crossing of the phantom divide line. This crossing or (de)-phantomization characterized by the change of the sign of the kinetic term of the scalar field is smooth and driven dynamically by the Einstein equations. Different cosmological scenarios, including the phantom phase of matter are sketched.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.043531
DOI:
10.1103/PhysRevD.72.043531
PACS:
98.80.Cq, 98.80.Jk
 
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