SpaceTime The Biggest Problem in Physics
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=RIqVnFtOSr4
What is the deepest level of reality? In this Quanta explainer, Vijay Balasubramanian, a physicist at the University of Pennsylvania, takes us on a journey through space-time to investigate what it’s made of, why it’s failing us, and where physics can go next. • Explore black holes, holograms, “alien algebra,” and more space-time geometry: https://www.quantamagazine.org/the-un... • 00:00 - The Planck length, an intro to space-time • 1:23 - Descartes and Newton investigate space and time • 2:04 - Einstein's special relativity • 2:32 - The geometry of space-time and the manifold • 3:16 - Einstein's general relativity: space-time in four dimensions • 3:35 - The mathematical curvature of space-time • 4:57 - Einstein's field equation • 6:04 - Singularities: where general relativity fails • 6:50 - Quantum mechanics (amplitudes, entanglement, Schrödinger equation) • 8:32 - The problem of quantum gravity • 9:38 - Applying quantum mechanics to our manifold • 10:36 - Why particle accelerators can't test quantum gravity • 11:28 - Is there something deeper than space-time? • 11:45 - Hawking and Bekenstein discover black holes have entropy • 13:54 - The holographic principle • 14:49 - AdS/CFT duality • 16:06 - Space-time may emerge from entanglement • 17:44 - The path to quantum gravity • -------- • VISIT our website: https://www.quantamagazine.org • LIKE us on Facebook: / quantanews • FOLLOW us Twitter: / quantamagazine • Quanta Magazine is an editorially independent publication supported by the Simons Foundation: https://www.simonsfoundation.org
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