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arXiv 0809.4628hep-phastro-phgr-qc
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基本耦合的时间变化与动力学暗能量

Time variation of fundamental couplings and dynamical dark energy

Thomas Dent, Steffen Stern, Christof Wetterich

摘要:

标量场动力学可能引起基本常数的非零宇宙学变化。在基于规范耦合的统一的不同场景中,各种声称的观测和边界可以被组合,以便跟踪或限制耦合和质量的时间历史。如果标量场是动力学暗能量或暗能量精华的来源,那么它的时间演化就可以得到宇宙学信息。结合这些信息与耦合的时间变化,可以确定标量和原子之间的相互作用强度,这可以通过弱等效原理的测试来观察。我们计算边界上的耦合变化率从实验测试的差分加速度的机构具有相同的质量和不同的组成,并比较各种方法的灵敏度。特别是,我们讨论了两个具体的标量演化模型:交叉的精髓和增长的中微子模型。

英文摘要:

Scalar field dynamics may give rise to a nonzero cosmological variation of fundamental constants. Within different scenarios based on the unification of gauge couplings, the various claimed observations and bounds may be combined in order to trace or restrict the time history of the couplings and masses. If the scalar field is responsible for a dynamical dark energy or quintessence, cosmological information becomes available for its time evolution. Combining this information with the time variation of couplings, one can determine the interaction strength between the scalar and atoms, which may be observed by tests of the Weak Equivalence Principle. We compute bounds on the present rate of coupling variation from experiments testing the differential accelerations for bodies with equal mass and different composition and compare the sensitivity of various methods. In particular, we discuss two specific models of scalar evolution: crossover quintessence and growing neutrino models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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