Download the slides
Download the slides
Download the slides
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Standard slow-‐roll inflation <br />
S =<br />
⇤<br />
d 4 x ⇥<br />
ä<br />
a = 8 G<br />
3<br />
V ( )<br />
V (⇥)<br />
Inflation occurs under <strong>the</strong> condition <br />
g<br />
⇥<br />
R<br />
16 G + X V (⇥)<br />
On <strong>the</strong> FLRW background, <strong>the</strong> scale factor obeys <br />
˙2<br />
˙⇥2 ⇥<br />
X = 1 (⇥ )2<br />
2<br />
V ( )<br />
Slow-‐roll <br />
The field evolves slowly along a <br />
nearly flat potential (slow-‐roll). <br />
In this case <br />
H<br />
Cosmic acceleration <br />
ȧ<br />
a ⇥ const. a e H inf t
Change language