Geometrodynamics of variable-speed-of-light cosmologies -: art. no. 103518

被引:70
作者
Bassett, BA [1 ]
Liberati, S
Molina-París, C
Visser, M
机构
[1] Univ Portsmouth, Div Math & Stat, Relat & Cosmol Grp, Portsmouth PO1 2EG, Hants, England
[2] Univ Oxford, Dept Theoret Phys, Oxford OX1 3NP, England
[3] SISSA, I-34014 Trieste, Italy
[4] Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy
[5] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
[6] Washington Univ, Dept Phys, St Louis, MO 63130 USA
[7] INTA, Ctr Astrobiol, Madrid 28850, Spain
来源
PHYSICAL REVIEW D | 2000年 / 62卷 / 10期
关键词
D O I
10.1103/PhysRevD.62.103518
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Variable-speed-of-light (VSL) cosmologies are currently attracting interest as an alternative to inflation. We investigate the fundamental geometrodynamic aspects of VSL cosmologies and provide several implementations which do not explicitly break Lorentz invariance (no "hard'' breaking). These ''soft'' implementations of Lorentz symmetry breaking provide particularly clean answers to the question "VSL with respect to what?." The class of VSL cosmologies,vr consider are compatible with both classical Einstein gravity and low-energy particle physics. These models solve the "kinematic" puzzles of cosmology as well as inflation does, but cannot by themselves solve the flatness problem, since in their purest form no violation of the strong energy condition occurs. We also consider a heterotic model (VSL plus inflation) which provides a number of observational implications for the low-redshift universe if chi contributes to the ''dark energy" either as CDM or quintessence. These implications include modified gravitational lensing, birefringence, variation of fundamental constants and rotation of the plane of polarization of light from distant sources.
引用
收藏
页码:1 / 18
页数:18
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