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Hessence: a new view of quintom dark energy

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Wei, Hao, Cai, Rong-Gen, Zeng, Ding-Fang·2005·Classical and Quantum Gravity

Abstract

Recently a lot of attention has been given to building a dark energy model in which the equation-of-state parameter w can cross the phantom divide w = −1. One of the models to realize crossing the phantom divide is called the quintom model, in which two real scalar fields appear, one is a normal scalar field and the other is a phantom-type scalar field. In this paper we propose a non-canonical complex scalar field as the dark energy, which we dub ‘hessence’, to implement crossing the phantom divide, in a similar sense as the quintom dark energy model. In the hessence model, the dark energy is described by a single field with an internal degree of freedom rather than two independent real scalar fields. However, the hessence is different from an ordinary complex scalar field, we show that the hessence can avoid the difficulty of the Q -ball formation which gives trouble to the spintessence model (an ordinary complex scalar field acts as the dark energy). Furthermore, we find that, by choosing a proper potential, the hessence could correspond to a Chaplygin gas at late times.

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Metadata

Authors
Wei, H., Cai, R.-G., & Zeng, D.-F.
Venue
Classical and Quantum Gravity
Published
2005-07-22
Volume
22
Issue
16
Pages
3189-3202
ISSN
  • 0264-9381 (ISSN-L)
  • 1361-6382
OpenAlex
W2056741262
Cited by
325
References
5
FWCI
21.86
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Hessence: a new view of quintom dark energy. https://app.cochat.ai/papers/10.1088/0264-9381/22/16/005
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Wei, H., Cai, R.-G., & Zeng, D.-F. (2005). Hessence: a new view of quintom dark energy. Classical and Quantum Gravity. https://doi.org/10.1088/0264-9381/22/16/005

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