The constraints on the variation of the fundamental constant that we have described so far are mainly related to their cosmological evolution so that, given the Copernican principle, they reduce to constrains on the time variation of the fundamental constants. Indeed, spatial variations can also occur. They may be used to set constraints in two regimes:
http://www.livingreviews.org/lrr-2011-2 |
Living Rev. Relativity 14, (2011), 2
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