tag:blogger.com,1999:blog-2846514233477399562.post2758239724709080962..comments2024-01-08T09:37:04.406+01:00Comments on RÉSONAANCES: Weekend Plot: Inflation'15Jesterhttp://www.blogger.com/profile/08947218566941608850noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-2846514233477399562.post-23188897135421485022015-02-09T17:05:36.912+01:002015-02-09T17:05:36.912+01:00Oh, that's way beyond my expertise :) Planck h...Oh, that's way beyond my expertise :) Planck had a few papers about it, e.g. 1405.0872 or 1409.2495, though I think they don't know for sure either... Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-83900558478101908422015-02-09T16:27:37.934+01:002015-02-09T16:27:37.934+01:00Can you write something on polarization by dust gr...Can you write something on polarization by dust grains? If grains consist of trillions and trillions of different kind of molecules as I think,how does it polarize micro waves and how confident one can be in these calculations?kashyap vasavadahttps://www.blogger.com/profile/10732897306667764590noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-52574551348821515292015-02-09T10:47:26.427+01:002015-02-09T10:47:26.427+01:00Right, by "exponential potential" I mean...Right, by "exponential potential" I meant ~(1 - e^{-a \phi}) or ~(1 - e^{-a \phi})^2. I clarified this in the text. Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-78029815211892261962015-02-09T03:57:03.974+01:002015-02-09T03:57:03.974+01:00It looks like the collaboration submitted 17 paper...It looks like the collaboration submitted 17 papers to the arXiv, all in the span of ~30 seconds on Thursday afternoon. I can't decide if this is an impressive display of collaboration discipline or a sign of attention to detail that borders on the pathological.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-60162229795804847812015-02-08T23:14:23.312+01:002015-02-08T23:14:23.312+01:00Thanks for this picture Jester: it clarifies all r...Thanks for this picture Jester: it clarifies all recent developments.<br />Let me point out that Weinberg, in his "Cosmology" (2008) book, rules out in p.488 the exponential potentials. But the potentials that last constrains favor are: squared Ricci scalar & alpha-attractors (that correspond to exponential squared potentials).Antonio (AKA "Un fĂsico")noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-53346788256398219142015-02-07T19:31:57.366+01:002015-02-07T19:31:57.366+01:00I would not trust too much this bound on r: it is ...I would not trust too much this bound on r: it is based on a global fit that relies on many many assumptions. Surely Planck makes a careful job, but as usual various uncertainties are a matter of opinion, being defined only up to O(1) factors. Global fits for r will soon become irrelevant: clearly the future is going for direct measurementsAnonymousnoreply@blogger.com