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Articles: Devotion | Quest for Infinity - 08
- Prof. venkata ramanamurty mallajosyula
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Alan Guth
Hyper Inflation
This figure above captures the essence of the Guth model for inflation. Suppose we start with the radius of the Universe as we know it to be today and work backwards based on the known expansion rate of the Universe. We would then get the curve labelled BBM [Big Bang Model]. The Guth model says that the Universe actually started off much smaller but suddenly blew up, in an incredibly short period of time – this is what inflation is all about. Why such a “crazy” model? So that two knotty problems explained in the text can be got rid off. OK, the model solves the problems all right; but is there any shred of experimental evidence that such an inflation actually occurred? Yes, and that is what the Nobel awards of 2006 for Physics imply! OK, but is Guth 100% correct? Any alternatives? Sure, but that story comes later!
I know it all sounds pretty crazy but that is not the way Guth put forward his theory! He did it via systematic and professional arguments of course, but the gist of what he said was: Before the inflation, the Universe had a radius of only 10-50 cm or so, small enough for radiation to mix and fill it up uniformly. After the inflation, the Universe was too big as in earlier models but that was no problem any more because the Universe had already become filled uniformly. Guth’s inflationary model also took care of the flatness problem neatly and so there was much relief amongst cosmologists – two nasty questions had been settled; or so it seemed!
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