Shows
Into the Impossible With Brian KeatingCan Cosmic Strings Solve The Early Galaxy Problem? | Robert BrandenbergerCosmic strings, theorized as topological defects from the early universe, are being explored for their potential to solve significant cosmological puzzles.Renowned physicist Robert Brandenberger gave a lecture about their properties, formation, and persistence in various models beyond the standard particle physics framework.Cosmic strings might explain the existence of supermassive black holes and early galaxies observed by the James Webb Space Telescope.Superconducting cosmic strings emitting gravitational and electromagnetic radiation further support the formation of early universe structures.Understanding and detecting cosmic strings could change our knowledge of the universe...2024-08-0944 min
Into the Impossible With Brian KeatingString Gas Cosmology: Challenging Inflation | Robert BrandenbergerWatch this episode on YouTube to see the slides: https://youtu.be/G3xy-bEDJCY
"I view string theory as the most promising way to quantize matter and gravity in a unified way. We need both quantum gravity and we need unification and a quantization of gravity. One of the reasons why string theory is promising is that there are no singularities associated with those singularities are the same type that they offer point particles." — Robert BrandenbergerIn this thought-provoking conversation, my grad school mentor, Robert Brandenberger shares his unique perspective on various cosmological concepts. He ch...2023-08-091h 55
The Physics of Fine-TuningInflation in the FutureWhat should we expect to learn in the future? In the fourth part of their chat, Dave Sloan and Robert Brandenberger talk about how we expect inflationary theory to develop, and how observations may lead to new physics in this area.2017-04-0407 minThe Physics of Fine-TuningStrings, Inflation, and AlternativesIn the third part of their discussion, Dave Sloan and Robert Brandenberger explain the relationship between string theory and inflationary models. Can inflation arise from particle physics, or do we need to look for alternative models? This discussion was conducted at the University of Oxford on March 14, 2017.2017-04-0424 minThe Physics of Fine-TuningInflation PredictsIn the second part of their discussion, Dave Sloan and Robert Brandenberger tell us what inflation predicts and whether inflation itself seems fine-tuned. This discussion was conducted at the University of Oxford on March 14, 2017.2017-04-0415 minThe Physics of Fine-TuningEvidence For InflationIn the first part of their discussion, Dave Sloan and Robert Brandenberger go over our evidence for inflationary theories and discuss how inflationary models improve on the hot big bang. This discussion was conducted at the University of Oxford on March 14, 2017.2017-04-0421 minThe Physics of Fine-TuningPanel on InflationProfessor Joe Silk talks with Professor Robert Brandenberger, Professor Jerome Martin, and Dr. Dave Sloan about the current state of research and controversies surrounding inflation. They discuss the possibility of connecting inflation to string theory and the likelihood of the initial conditions required by inflationary models. This lecture was conducted at the Dennis Sciama Theatre at the Denys Wilkinson Building, Oxford, on March 14, 2016.2017-04-0422 minThe Physics of Fine-TuningDoes Inflationary Cosmology Solve Fine-Tuning Problems?Professor Robert Brandenberger (McGill) argues that inflationary models still face considerable challenges. He discusses the relationship between inflationary models and particle physics, including string theory and examines alternatives to standard inflationary models. This lecture was conducted at the Dennis Sciama Theatre at the Denys Wilkinson Building, Oxford, on March 14, 2016.2017-04-0447 min