Phantom energy mediates a long-range repulsive force
Scalar field models with nonstandard kinetic terms have been proposed in the context of k inflation, of Born-Infeld Lagrangians, of phantom energy and, more in general, of low-energy string theory. In general, scalar fields are expected to couple to matter inducing a new interaction. In this Letter...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
29 October 2004
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| In: |
Physical review letters
Year: 2004, Volume: 93, Issue: 18 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.93.181102 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.93.181102 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.93.181102 
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| Author Notes: | Luca Amendola, INAF/Osservatorio Astronomico di Roma, Viale Frascati 33, 00040 Monteporzio Catone, Roma, Italy |
| Summary: | Scalar field models with nonstandard kinetic terms have been proposed in the context of k inflation, of Born-Infeld Lagrangians, of phantom energy and, more in general, of low-energy string theory. In general, scalar fields are expected to couple to matter inducing a new interaction. In this Letter I derive the cosmological perturbation equations and the Yukawa correction to gravity for such general models. I find three interesting results: first, when the field behaves as phantom energy (equation of state less than −1), then the coupling strength is negative, inducing a long-range repulsive force; second, the dark-energy field might cluster on astrophysical scales; third, applying the formalism to a Brans-Dicke theory with a general kinetic term it is shown that its Newtonian effects depend on a single parameter that generalizes the Brans-Dicke constant. |
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| Item Description: | Gesehen am 16.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.93.181102 |