tag:blogger.com,1999:blog-6976071487922527618.post3557310891776614517..comments2024-03-27T05:38:30.610+01:00Comments on Blank On The Map: BICEP and listening to real expertsSesh Nadathurhttp://www.blogger.com/profile/07155102110438904961noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-6976071487922527618.post-84557539676144156602014-05-19T21:33:33.752+02:002014-05-19T21:33:33.752+02:00Ned wright of wmap commented on this in his news o...Ned wright of wmap commented on this in his news of the universe blog. No.<br /><br />Looks like we need to wait 3 years for the triple frequency tricept3 results.<br /><br /><br />Anonymoushttps://www.blogger.com/profile/03677669147241896991noreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-56368787337465673462014-05-19T11:06:06.755+02:002014-05-19T11:06:06.755+02:00I just don't see how it can hold up, Sesh. I j...I just don't see how it can hold up, Sesh. I just don't see how a signal originating from 10¯³² seconds after the Big Bang can survive the super-hot "maelstrom" that lasted the 380,000 years until the CMB photon decoupling, which took place 13.8 billion years ago. It's like saying <i>we can see the ripples in the cosmic jelly that prove inflation</i>. Only the jelly has been through a blender. Twice. I don't believe it. And I don't believe in inflation any more. I believe in expansion. l believe space has to expand, and that it can't do anything else. But I now think inflation and the inflaton is a solution to a problem that doesn't exist. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-48747335207922622012014-05-18T17:47:47.349+02:002014-05-18T17:47:47.349+02:00No, let me clarify ...
There are currently no mod...No, let me clarify ...<br /><br />There are currently <i>no</i> models of inflation, as far as I know, that are complete. Each model has some problems, some with the naturalness of getting a flat enough potential, some with initial conditions, many with reheating the universe after inflation. Not all of these problems are necessarily insoluble, it's possible that some models can be made complete in the future. It's just that many people used to be of the opinion that the problems that small-field models faced were more amenable to solution than those of large-field models. But even on this point opinions differ, sometimes quite strongly. The BICEP result, if it holds up, would settle the argument using data rather than mere opinion.Sesh Nadathurhttps://www.blogger.com/profile/07155102110438904961noreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-40731579103993796062014-05-18T14:40:41.915+02:002014-05-18T14:40:41.915+02:00Good stuff Sesh. I think there's more to all t...Good stuff Sesh. I think there's more to all this than meets the eye myself. <br /><br />For example, follow up on that footnote. Some types of inflation are unnatural/incomplete, and BICEP has ruled out the others? And inflation is said to be responsible for the uniformity of the CMB, and the non-uniformity? Look closely at the original <a href="http://www.mathpages.com/rr/s7-02/7-02.htm" rel="nofollow">frozen-star black-hole interpretation</a> and think in terms of a "frozen" early universe that somehow undergoes a phase change. The initial expansion is very rapid, and it can look instant with gravitational-like time dilation. But inflation per se is... superfluous. Anonymousnoreply@blogger.com