|Subject: What is the origin of the inflaton field?
Date: Thu, 01 May 2003 14:18:22 +0300
From: Dimi Chakalov <email@example.com>
To: Shinji Tsujikawa <firstname.lastname@example.org>,
Shinji Tsujikawa <email@example.com>
CC: Takahiro Tanaka <firstname.lastname@example.org>,
Gary Hinshaw <Gary.F.Hinshaw.email@example.com>,
Chuck Bennett <Charles.L.Bennett.firstname.lastname@example.org>,
David Spergel <email@example.com>,
David Parkinson <firstname.lastname@example.org>,
"Bruce A. Bassett" <email@example.com>,
Alan Guth <firstname.lastname@example.org>,
Arvind Borde <email@example.com>,
Alexey Starobinsky <firstname.lastname@example.org>,
Robert Wald <email@example.com>,
Stefan Hollands <firstname.lastname@example.org>, email@example.com,
Dear Dr. Shinji,
In your web page at
you wrote: "I am willing to collaborate with many people. Please be free to contact with me!"
May I ask you to help me understand three puzzles of the inflaton field.
In your recent "Introductory review of cosmic inflation", hep-ph/0304257 [Ref. 1], you wrote:
"In fact temperature anisotropies observed by the COBE satellite in 1992 exhibit nearly scale-invariant spectra as predicted by the inflationary paradigm. Recent observations of WMAP also show strong evidence for inflation ."
1. Can any of the inflationary models -- R^2, new, chaotic, extended, power-law, hybrid, natural, supernatural, extranatural, eternal, D-term, F-term, brane, oscillating, trace-anomaly driven, ..., etc. -- explain the so-called cosmic equator and pin down the topology of space? Please see
You also wrote [Ref. 1]: "When the inflationary period ends, the evolution of the universe is followed by the standard big-bang cosmology, and the comoving Hubble radius begins to increase. Then the scales of perturbations cross inside the Hubble radius again (the second horizon crossing), after which causality works."
2. How can you restore the causality "during" a period of "time" in which it is gone, zilch, non-existent?
Many years ago, in April 1986, Yakov Zel'dovich wrote me a nice letter in which he explained the big bang scenario as follows: "Long time ago there was a period of time during which there was still no time at all."
To explain this ultimate puzzle, imagine a super-powerful vacuum cleaner which suck everything, following strictly the deflation time,
At some critical moment, the vacuum cleaner will suck itself and will cease to exist, as pointed out by the late Yakov Zel'dovich.
3. Can you explain this miracle without the Aristotelian Prima Cause or Unmoved Mover? Please see
I very much hope to hear from you and from your colleagues.
Thank you very much for your time, as read by your clock.
[Ref. 1] Shinji Tsujikawa, Introductory
review of cosmic inflation,