Complex Lagrangians and phantom cosmology

Details Complex Lagrangians and phantom cosmology Complex Lagrangians and phantom cosmology

2006-04-28

arxiv.org/abs/gr-qc/0604126v2

J.Phys.A39:9975-9982,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, to be published in J.Phys.A, refs. added

Scientific paper

10.1088/0305-4470/39/32/S02

Motivated by the generalization of quantum theory for the case of non-Hermitian Hamiltonians with PT symmetry, we show how a classical cosmological model describes a smooth transition from ordinary dark energy to the phantom one. The model is based on a classical complex Lagrangian of a scalar field. Specific symmetry properties analogous to PT in non-Hermitian quantum mechanics lead to purely real equation of motion.

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