Cosmological acceleration, varying couplings, and Lorentz breaking

被引：117

作者：

Bertolami, O ^{[1
]}

Lehnert, R

Potting, R

Ribeiro, A

机构：

[1] Inst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal

[2] Univ Algarve, Dept Fis, CENTRA, P-8000117 Faro, Portugal

来源：

PHYSICAL REVIEW D | 2004年 / 69卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.69.083513

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Many candidate fundamental theories contain scalar fields that can acquire spacetime-varying expectation values in a cosmological context. Such scalars typically obey Lorentz-violating effective dispersion relations. We illustrate this fact within a simple supergravity model that also exhibits the observed late-time cosmological acceleration and implies varying electromagnetic couplings.

引用

页数：11

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