Smooth Crossing of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>w</mml:mi><mml:mi>&#x039B;</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mo>&#x2212;</mml:mo><mml:mn>1</mml:mn></mml:math> Line in a Single Scalar Field Model

Sanyal, Abhik Kumar

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Advances in High Energy Physics
Volume 2009 (2009), Article ID 612063, 14 pages
doi:10.1155/2009/612063

Research Article

Smooth Crossing of wΛ=−1 Line in a Single Scalar Field Model

Abhik Kumar Sanyal

Department of Physics, Jangipur College, Murshidabad, West Bengal 742213, India

Received 8 April 2009; Accepted 23 June 2009

Academic Editor: C. Q. Geng

Copyright © 2009 Abhik Kumar Sanyal. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Smooth double crossing of the phantom divide line wΛ=−1 has been found possible with a single minimally coupled scalar field for the most simple form of generalized k-essence cosmological model, in the presence of background cold dark matter. Such crossing is a sufficiently late time transient phenomenon and does not have any pathological behaviour.