New probes of initial state of quantum fluctuations during inflation
New probes of initial state of quantum fluctuations during inflation
New probes of initial state of quantum fluctuations during inflation
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ζkL rescales coordinates<br />
• The long-wavelength<br />
curvature perturbation<br />
rescales the spatial<br />
coordinates (or changes the<br />
expansion factor) within a<br />
given Hubble patch:<br />
• ds 2 =–dt 2 +[a(t)] 2 e 2ζ (dx) 2<br />
ζkL<br />
left the horizon already<br />
Separated by more than H -1<br />
x1=x0e ζ1 x2=x0e ζ2<br />
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