Chapter
The Weird Ways Space-Time Can Be Curved
49:32 - 1:00:56 (11:23)
The three simplest space-times are flat space-time, negatively-curved space-time, and positively-curved space-time, and we can have curvature in a way that mixes up space and time. The holographic principle is not yet understood for either flat space or asymptotically, the Sitter space, which we appear to be living in as the universe continues to expand.
Clips
Physicists Stephen Hawking and Jacob Bekenstein showed that a black hole must store a number of gigabytes proportional to its area divided by four times Newton's constant times Planck's constant, or else quantum mechanics and gravity would be inconsistent.
49:32 - 51:56 (02:23)
Summary
Physicists Stephen Hawking and Jacob Bekenstein showed that a black hole must store a number of gigabytes proportional to its area divided by four times Newton's constant times Planck's constant, or else quantum mechanics and gravity would be inconsistent.
ChapterThe Weird Ways Space-Time Can Be Curved
Episode#359 – Andrew Strominger: Black Holes, Quantum Gravity, and Theoretical Physics
PodcastLex Fridman Podcast
This episode explains the concept of curvature in space-time, including the three simplest space-times: flat space-time (Minkowski space-time), negatively curved space-time (anti-Sitter space), and positively curved space-time (Sitter space).
51:56 - 56:22 (04:25)
Summary
This episode explains the concept of curvature in space-time, including the three simplest space-times: flat space-time (Minkowski space-time), negatively curved space-time (anti-Sitter space), and positively curved space-time (Sitter space). The episode also discusses the challenges in understanding the holographic principle for flat space and the asymptotically Sitter space, where space is flat but space-time is curved as the universe continues to expand.
ChapterThe Weird Ways Space-Time Can Be Curved
Episode#359 – Andrew Strominger: Black Holes, Quantum Gravity, and Theoretical Physics
PodcastLex Fridman Podcast
The expansion of the Universe is what creates a large timescale in comparison to a human life or the decay of a neutron.
56:22 - 1:00:56 (04:34)
Summary
The expansion of the Universe is what creates a large timescale in comparison to a human life or the decay of a neutron. The curvature of space-time is affected by the matter within it, as matter causes space-time to curve.