Physics Frontiers Entropic Gravity
May 4, 2019
Delve into the idea that gravity might not be a fundamental force but an emergent phenomenon tied to entropy. Discover how hot gases around galaxies challenge notions of dark matter. Learn about innovative materials that could leverage entropy to create gravitational fields. Explore the mind-bending connections between gravity, quantum mechanics, and dark energy. Unravel complex theories that seek to unify fundamental forces through the lens of entropy gradients, prompting a reexamination of our understanding of the universe.
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Gravity as Entropic Emergence
- Entropic gravity models space-time and gravity as emergent phenomena from entropy and temperature gradients.
- Gravity emerges as a force related to information and entropy on holographic spherical surfaces surrounding mass.
Polymer Analogy for Gravity
- Verlinde uses a polymer analogy to explain entropic forces, where pulling reduces entropy and requires energy.
- This analogy extends to gravity as an emergent entropic force tied to information density on holographic spheres.
Entropy Clarifies Dark Matter Models
- Entropic gravity contrasts with MOND by having a first-principles basis rather than an ad hoc fit for missing mass.
- Including hot gases with high entropy produces different predictions, highlighting entropy's role in emergent gravity effects.