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Re: hubble scale
SO i asked now my professor about the difference between sub- and super- hubble scale and sub- and super-horizon.
The Hubble scale gives the limit distance of an two events connected by causality in the case of a non-inflanatory universe (ie one which never had a period of inflation). The horizon is the limit distance of causality for an inflanationnary universe, which can be bigger than the hubble scale!
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