Quantum information science

Holographic principle

The holographic principle is an axiom in string theories and a supposed property of quantum gravity that states that the description of a volume of space can be thought of as encoded on a lower-dimensional boundary to the region — such as a light-like boundary like a gravitational horizon. First proposed by Gerard 't Hooft, it was given a precise string-theory interpretation by Leonard Susskind, who combined his ideas with previous ones of 't Hooft and Charles Thorn. Leonard Susskind said, “The three-dimensional world of ordinary experience––the universe filled with galaxies, stars, planets, houses, boulders, and people––is a hologram, an image of reality coded on a distant two-dimensional surface." As pointed out by Raphael Bousso, Thorn observed in 1978 that string theory admits a lower-dimensional description in which gravity emerges from it in what would now be called a holographic way. The prime example of holography is the AdS/CFT correspondence. The holographic principle was inspired by black hole thermodynamics, which conjectures that the maximum entropy in any region scales with the radius squared, and not cubed as might be expected. In the case of a black hole, the insight was that the information content of all the objects that have fallen into the hole might be entirely contained in surface fluctuations of the event horizon. The holographic principle resolves the black hole information paradox within the framework of string theory.However, there exist classical solutions to the Einstein equations that allow values of the entropy larger than those allowed by an area law (radius squared), hence in principle larger than those of a black hole. These are the so-called "Wheeler's bags of gold". The existence of such solutions conflicts with the holographic interpretation, and their effects in a quantum theory of gravity including the holographic principle are not yet fully understood. (Wikipedia).

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Are We Living in a Holographic Universe? (Part 3 of 3)

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From playlist Seeker Plus

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Entropy Bounds, Light-sheets, and the Holographic Principle in Cosmology, part 1 - Raphael Bousso

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From playlist PiTP 2011

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From playlist Physics

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What is the Holographic Principle?

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From playlist Mathematics

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Do We Live in a Hologram? Understanding the Holographic Principle

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From playlist Guide to Space

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Hologram Project!!!

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The Holometer: A Fermilab Experiment

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From playlist Detectors and Accelerators

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34 Subatomic Stories: Do we live in a holographic universe?

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From playlist Subatomic Stories

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Is the Universe REALLY a Hologram?

Check out the physics courses that I mentioned (many of which are free!) and support this channel by going to https://brilliant.org/Sabine/ where you can create your Brilliant account. The first 200 will get 20% off the annual premium subscription. Is the universe a hologram, a projection

From playlist Physics

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A Thin Sheet of Reality: The Universe as a Hologram

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From playlist Explore the World Science Festival

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The Holographic Universe Explained

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From playlist Understanding the Holographic Universe

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Symmetry in Quantum Gravity by Hirosi Ooguri

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From playlist Kavli Asian Winter School (KAWS) on Strings, Particles and Cosmology 2018

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Lattice Holographic Cosmology and the Renormalization of the 2-Point Function...by Kostas Skenderis

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Anti-de Sitter space | Boltzmann's entropy formula | String theory | Logarithm | Degrees of freedom (physics and chemistry) | Yang–Mills theory | Isomorphism | Density matrix | Detailed balance | Non-perturbative | Bekenstein bound | Information content | Entropy | Boundary (topology) | Information theory | Margolus–Levitin theorem | Digital physics | Virasoro algebra | Conformal field theory | Entropic gravity | Planck units | Stephen Hawking | Einstein field equations | Second law of thermodynamics | Space | Supergravity | Speed of light