Transient and late time attractor tachyon dark energy: Can we distinguish it from quintessence?

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.123501· OSTI ID:21300932

Ali, Amna; Sami, M; Sen, A A ^[1]

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1. Centre of Theoretical Physics, Jamia Millia Islamia, New Delhi-110025 (India)

The string inspired tachyon field can serve as a candidate of dark energy. Its equation of state parameter w varies from 0 to -1. In the case of tachyon field potential V({phi}){yields}0 slower (faster) than 1/{phi}{sup 2} at infinity, dark energy (dark matter) is a late time attractor. We investigate the tachyon dark energy models under the assumption that w is close to -1. We find that all the models exhibit unique behavior around the present epoch which is exactly the same as that of the thawing quintessence.

• OSTI ID: 21300932
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 12; Other Information: DOI: 10.1103/PhysRevD.79.123501; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EQUATIONS OF STATE
NONLUMINOUS MATTER
POTENTIALS
TACHYONS
THAWING
TRANSIENTS