Lecture 40 - The Big and the Small The Inflationary Universe

AstroPHYSICS with Srini (https://www.youtube.com/@astrophysics...)
The newly launched youtube channel of Prof. Srinivasan. WATCH it, SUBSCRIBE to it, and bring it to the attention of your friends! And here is why.

The present course of introductory lectures will end with the 41st lecture. There are many topics in basic physics, as well as astrophysics, that you encountered in this course that deserves a 'revisit'. Prof. Srinivasan plans to make new videos on these topics and upload them to this channel. This will start to happen after the last lecture of this series has been released. Meanwhile, this channel is up. Currently, the PLAYLIST contains the 40 lectures that he delivered at the International Centre for Theoretical Sciences, a few years ago.

You are welcome to contact Prof. Srinivasan at astrowithsrini@gmail.com if you have suggestions for topics, or if you have questions.

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"We do not yet have a convincing, detailed model of how and why inflation transpired because the models of particle physics that we have are not adequate at the huge energies of inflation. Understanding inflation requires a much better knowledge of particle physics than we have now, and possibly a full knowledge of string theory and quantum gravity." - Edward Witten (2002)

ABOUT THE LECTURE
In this lecture, ideas developed in the previous lecture will be invoked to understand why the universe might have initially expanded exponentially – the so-called inflationary phase. First, the idea of spontaneous symmetry breaking and phase transitions are reviewed. Then the concept of “cosmological phase transitions associated with symmetry breaking” are introduced. With this background, Alan Guth’s idea of exponential expansion associated with the Grand Unified Theory phase transition is explained

ABOUT THE LECTURE SERIES
This lecture series is organized by the Astronomical Society of India as a part of its Golden Jubilee celebrations. Aimed at undergraduate and graduate students, this series of talks by renowned astrophysicist and teacher, Prof G. Srinivasan, starts from the first principles of Physics and builds up the subject rigorously to the present state of our understanding.

Series website: https://astron-soc.in/srini-ana
The website hosts a question bank as well as a list of suggested reading for each lecture (prepared by Dr. Sushan Konar)

ABOUT THE SPEAKER
Professor G. Srinivasan
In a research career spanning more than five decades, his interests have spanned many aspects of physics and astrophysics. He is a passionate teacher and has authored two outstanding Astronomy texts titled ‘What Are The Stars?’ and ‘Can Stars Find Peace?’ He is a Past President of the Astronomical Society of India, and a Past President of the Division on Space and High Energy Astrophysics of the International Astronomical Union. In his distinguished career he has worked at the University of Chicago, USA; the IBM Research Laboratory in Zurich, Switzerland; Chalmers University of Technology, Goteborg, Sweden; the Cavendish Laboratory, University of Cambridge, England and the Raman Research Institute, Bengaluru

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This series is also supported by the IAU OAE Centre in India
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