Does the Universe Bounce? A Conversation with Anna Ijjas (#236)

Into the Impossible With Brian Keating

Brian Keating

Science, Physics, Natural Sciences

4.7 • 1.1K Ratings

🗓️ 3 July 2022

⏱️ 76 minutes

🔗️ Recording | iTunes | RSS

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Summary

Was there a Big Bang? Did the universe emerge from a singularity? Is there any evidence for a Multiverse? Anna Ijjas and I explore these questions and much more, including her incredibly fascinating work on bouncing cosmological models. Anna Ijjas is a research faculty at New York University. Her research lies at the intersection of gravitational theory and cosmology. She has pioneered the application of mathematical and numerical relativity to cosmology with the goal of developing novel theories that explain the origin, structure and evolution of our universe. Her work has already led to several advances in this new field, including the establishment of slow contraction as a rapid and robust smoother. Currently, she is developing novel mathematical and computational methods for studying the effects of modifications of Einstein's relativity theory on cosmology and black holes. Her Website: https://anna-ijjas.com/ Topics discussed include: What should a theorist know about experimental cosmology? Why is the cyclic universe theory not often taught and often ignored? The Friedman Equations. What is geodesic complete? Some alternative theorems. Inflation and scalar fields. Quantum fluctuations in the scalar field. About the Hubble Tension! What's Anna's take? What should we be teaching young cosmologists? 📺 Watch my most popular video about Bouncing Cosmology and more: https://www.youtube.com/watch?v=Gvi2hL2FnOc A New Contender is Here! https://www.youtube.com/watch?v=-6A6myur--c Frank Wilczek https://youtu.be/3z8RqKMQHe0?sub_confirmation=1 Weinstein and Wolfram https://www.youtube.com/watch?v=OI0AZ4Y4Ip4?sub_confirmation=1 Sheldon Glashow: https://youtu.be/a0_iaWgxQtA?sub_confirmation=1 Neil deGrasse Tyson https://youtu.be/1kxgK6J4S5Y Michio Kaku: https://youtu.be/3to9ymn-XKI Michael Saylor: https://youtu.be/CaN_CDKqXOg?sub_confirmation=1 Sir Roger Penrose: https://youtu.be/AMuqyAvX7Wo Be my friend: 🏄‍♂️ Twitter: https://twitter.com/DrBrianKeating 🔔 Subscribe https://www.youtube.com/DrBrianKeating?sub_confirmation=1 📝 Join my mailing list; just click here http://briankeating.com/mailing_list.php ✍️ Detailed Blog posts here: https://briankeating.com/blog.php 🎙️ Listen on audio-only platforms: https://briankeating.com/podcast.php A production of http://imagination.ucsd.edu/ Support the podcast: https://www.patreon.com/drbriankeating Produced by Brian Keating & Stuart Volkow P.G.A. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0	I'm in cosmology, the map, the temperature and isotropy map of the CMB with the
0:06.2	equations that describe it, you know, it's really because in order to, first of all, we share
0:11.7	this with everyone in the universe right
0:14.4	this is just our universe and in that map it's all of our physics that we figure and
0:19.1	also what we haven't figured. Einstein relativity, the black body radiation, that photons, that light is
0:26.1	particle and wave, that electrons the atomic theory, quantum field theory to
0:30.4	understand the two and three- point functions, all the statistics.
0:33.4	Welcome everybody to an exciting episode of the Into the Impossible podcast
0:42.3	featuring yours truly Brian Keating in conversation
0:45.2	with a exceptional mind, a mind who is curious and passionate about the orthodoxy, or maybe the unorthodoxy, of what has become
0:59.4	the standard lore in cosmology.
1:01.8	And that's Dr. Anna Eegis of NYU. She's a brilliant
1:06.1	theoretician who studies the early universe, cosmological models. She's extremely
1:12.0	conversant in what we would consider maybe the standard model of cosmology,
1:17.8	so-called Lambda Cdm, with inflation layered on top, but she is one of a new breed of scientists who's not
1:26.7	content to merely look at what exists and take it as given. She is instead coming up with new models, new ideas, new theories in
1:36.0	collaboration with some of our past guests on the Into the Impossible
1:39.4	Podcast including Paul Steinhart and An upcoming guest, Neil Turock,
1:44.8	who is the Higgs professor of physics
1:47.9	at the Edinburgh University where Peter Higgs is.
1:51.5	And stay tuned for a biography of Peter Higgs is and stay tuned for a biography of Peter Higgs by Frank Close.
1:56.0	Wonderful biography that episode is upcoming.
	...

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