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Regular PapersNo Access

PHANTOM UNIVERSE FROM CPT SYMMETRIC QFT

ALEXANDER A. ANDRIANOV

V. A. Fock Department of Theoretical Physics, Saint Petersburg State University, 198904 S.-Petersburg, Russia

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,

FRANCESCO CANNATA

Dipartimento di Fisica and INFN, Via Irnerio 46, 40126 Bologna, Italy

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, and

ALEXANDER Y. KAMENSHCHIK

Dipartimento di Fisica and INFN, Via Irnerio 46, 40126 Bologna, Italy

L. D. Landau Institute for Theoretical Physics of the Russian Academy of Sciences, Kosygin str. 2, 119334 Moscow, Russia

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https://doi.org/10.1142/S021827180600911XCited by:18 (Source: Crossref)

Abstract

We develop a generalization of semiclassical field theory for the case of non-Hermitian Hamiltonians with CPT symmetry and construct a classical cosmological, scalar-field based model describing a smooth transition from ordinary dark energy to the phantom one. Our model arises from a Lagrangian with a complex potential leading to a non-trivial vacuum with real vacuum energy. Equivalence with models involving two scalar fields one of which is phantom-like is discussed.

Keywords:

PACS: 98.80.Cq, 98.80.Jk, 11.30.Er, 02.60.Lj

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Vol. 15, No. 08

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Received 31 May 2006

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