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

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

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