Leonard Susskind on The World As Hologram | TVO Docs
Why Hacker News recommends it
HN commenters recommend it as an accessible yet substantive introduction to the holographic principle and black hole information, often when related physics news comes up.
What it is
Stanford physicist Leonard Susskind gives a public lecture on the holographic principle, the indestructibility of information and the nature of black holes. It asks whether the world could be a hologram.
Recommended by 7 HN commenters across 5 different months, 2013 to 2021.
What Hacker News said
Recommends damon_c · 2013-12 · on “Simulations back up theory that Universe is a hologram”
I have found this Leonard Susskind lecture to come closest to answering the question of "why would anyone even suggest such a thing?" about this subject: [this video]
Recommends andy112 · 2013-12 · on “Simulations back up theory that Universe is a hologram”
Others can hopefully chime in with more, but when I first was learning about it, my reaction to the word "hologram" was the same as your (1). My understanding is that when they say "hologram", they're simply meaning an n dimensional object that's encoded in n-1 dimensional space. If you're not familiar with the basics of the Holographic Principle, start here: [LINK] It's been a while since I've watched these, but IIRC these are very good videos to start with: - [this video] - [LINK] EDIT: Key clippings from the wikipedia article- " But Jacob Bekenstein noted that this leads to a violation of the second law of thermodynamics. If one throws a hot gas with entropy into a black hole, once it crosses
Recommends platz · 2017-01 · on “Study reveals substantial evidence of holographic universe”
Black hole Firewalls with Sean Carroll and Jennifer Ouellette (45m+50s quick summary of the holographic principle) [LINK] Leonard Susskind on The World As Hologram (more dense/verbose) [this video]
Recommends keldaris · 2018-01 · on “Things you must know before you can understand Meltdown as a developer”
Since you asked for more depth, I'll focus on the (comparatively easier) task of giving some links to technical literature. First of all, if you already have a traditional QFT background, there's the two extremes of either just taking a simple toy example to play with [1] or a fairly rigorous well written lecture course [2]. For a more general physics/math background I'd recommend a slightly more pedagogical treatment [3], but it's still accurate to the subject matter and therefore contains graduate level mathematics. There's a lot more out there, but these are just some of the descriptions I've personally skimmed and found them to be well written and useful. On the other end of the scale, t
Recommends jahnu · 2019-01 · on “How Space and Time Could Be a Quantum Error-Correcting Code”
Not sure if it's related but this lecture gave me some basic grasp on the notion of holographic representations [this video]
Recommends zwkrt · 2019-01 · on “Strangeness of Black Holes”
Suskind actually has a whole lecture on Youtube devoted to addressing the paradox of falling into a black hole from the perspective of the person falling in versus an outside observer. The outside observer sees the falling observer catastrophically turned into high-entropy soup smeared across the horizon, while the one falling feels nothing particularly special as they cross the event horizon. [this video]
Recommends aeternum · 2019-08 · on “How do black holes destroy information and why is that a problem?”
There is a somewhat recent theory that supports this idea. It is unclear whether or not things actually fall-in, but the idea is that the entire surface is a hologram, and the surface alone is sufficient to describe the entire contents. (Thus preventing any information loss). Much better described here: [this video]
Cites Ygg2 · 2014-03 · on “Scientists May Get Best View Yet of a Black Hole in Action”
To be completely honest - There is no straight answer. One modern answer was that particles falling into a black hole would appear to be destroyed for outside observer (in a vortex of fire) while the observer would be scrambled into a holographic representation (keep in mind ashes would be a highly energetic representation of same observer). See [LINK] [this video]