The Quantum Theory that Connects the Entire Universe

Views 383 008
98% 12 190 215

SciShow is supported by Brilliant.org. Go to Brilliant.org/SciShow to get 20% off of an annual Premium subscription.
Quantum mechanics is weird and seems a bit...complicated. But understanding it can help us to understand the universe.
Hosted by: Hank Green
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at www.scishowtangents.org
Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow
Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:
Bill & Katie Scholl, Adam Brainard, Greg, Alex Hackman, Andrew Finley Brenan, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters
Looking for SciShow elsewhere on the internet?
Facebook: facebook.com/scishow
Twitter: twitter.com/scishow
Tumblr: scishow.tumblr.com
Instagram: instagram.com/thescishow

Image Sources:

Published on


Mar 20, 2019

SciShowscienceHankGreeneducationlearnThe Quantum Theory that Connects the Entire Universequantum mechanicsohysicslaserssemiconductorspilot wave theoryCopenhagen interpretationwaveparticlesuperpositionErwin Schrödinger’thought experimentcatradioactive decayatomLouis de BroglieDavid Bohmde Broglie-Bohm theoryequationlocalityuniverseEinsteinmethodcomputer




Loading link...

Add to:

My playlist
Watch later
Comments 1 288
SciShow 4 months ago
SciShow is supported by Brilliant.org. Go to Brilliant.org/SciShow to get 20% off of an annual Premium subscription.
Josh Lasky
Josh Lasky 3 months ago
Scishow...paid for by Deepak Chopra lol
Dadson worldwide
Dadson worldwide 3 months ago
The fact we the observer are at the center of the universes is the samething mans known forever .
Naveron 2 days ago
Pilot wave theory sounds a lot like the hidden variable interpretation
ProbablyNothing 3 days ago
The ability to determine an electron's spin when it is very far away is not a violation of locality. It is an example of the Reeh-Schlieder theorem, which among other things, states that in the vacuum sector of a quantum field theory, local measurements can always be used to exactly distinguish one state of the universe from another, even if that state includes information about the spin of an electron a million miles away. This is a direct consequence of locality, and is a perfectly reasonable thing to expect of a relativistic quantum theory. You haven't changed the state of the electron far away, just measured it.
Aidan Kedzierski
Aidan Kedzierski 5 days ago
The only thing faster than light is monarchy.
Atermagister 5 days ago
Schrodinscher? :,D SchrÖÖÖÖdinger c,: Just sounds funny ^^"
Chyn fu
Chyn fu 7 days ago
the reason electron are effecting each other faster speed of light is because they are part of a network strings.
Jcknight7996 11 days ago
Can you do an episode about QFT?
Howard Delovitch
Howard Delovitch 13 days ago
wHAT IS AN "Ex-Spearmint" ? and if you put a cat , in a box , and don't feed it.....it's gonna DIE!
50 subscribers without any videos without videos
Well, im just dead. Never been alive
Fantomp 17 days ago
What if the cat has an immunity to the poison
Lee Guthrie Quantum Spring
Very well done
1959Edsel 17 days ago
Wanted dead and alive: Schrodinger's Cat
Joseph Hutton
Joseph Hutton 19 days ago
How about a quantum theory compilation?!
Ali Kafafy
Ali Kafafy 26 days ago
Wow that cat is wanted dead or alive
M Man
M Man 26 days ago
The Schrodinger problem always had this one thing that put a wrench in the whole program the fact that the cat was living before you put it in the box it is able to make its own observations unless you poked both of its eyes out put a blindfold sounds like it would be a lot less harmful to the 🐈
Tippi B
Tippi B Month ago
I had the frustrating experience of understanding quantum mechanics for about 12 seconds and then it slipped away from me. I, a lowly writer of TV show reviews, was at the dog park talking to NASA scientists (I lived down the road from the Johnson Space Center) and I made a quantum mechanics joke. Except... I no longer remember the joke. It evaporated out of my mind as soon as I finished. But I do recall that the NASA people laughed heartily and said it made sense.
Devon Carter
Devon Carter Month ago
Just saying that if the pilot wave theory is true that would mean travel faster than the speed of light
Zoë de Wijn
Zoë de Wijn Month ago
but wouldnt the cat be able to observe weather or not the superposition happened and the poison got released, and therefore it would be only one of those things and not both?
iMeMyself Month ago
System call: generate quantum element. Form photon. Discharge.
Genave NNMN!
Genave NNMN! Month ago
Sheldon bring me here.
Vinish Month ago
Is that string theory?
Mavrick 1975
Mavrick 1975 Month ago
With scientist finding more and more things on the subatomic level I was wondering about beyond what we know now. If we can calculate the weight of a shadow and their is technically nothing their if you truly tried to create a vacuum and remove all known particals down to the quarks is it truly empty or is nothing made up of something?
altareggo Month ago
Trump supporters are perpetually interposed in the narrow space between conspiracy theories and "alternate facts".
Raven White
Raven White Month ago
The distance between the sun and the black hole of our universe is spaced the same distance equal to the golden ratio, allowing gravitational balance. The sun is powered by the destruction of the black hole. That is why the sun will not change without the input of the black hole equally changing. Makes sense, no?
ykOni Month ago
What is this world?
Maldus Alver
Maldus Alver Month ago
time to play a game of quantum tic-tac-toe
Kaveevin Month ago
The more quantum mechanics videos I watch, the more evidence I get that we're all living in a simulation.
johnathan blevins
U guys should start sci show for dummies
Fitness and Firearms
My girlfriend was right. I am TOO high for this. Great video! Im subbing
Jason Hacker
Jason Hacker 2 months ago
Zombie cat video?
rogerdotlee 2 months ago
Now wait a minute. About superposition, the premise of the experiment is that you generate two electrons that MUST be spinning in the opposite direction. You then move them a couple giga-furlongs away from each other. You observe them and find they're spinning in opposite directions. Unless I'm missing something fundamental, the only reaction to this should be 'well duh! This tells me our electron-spin-generator is functioning as expected.' What am I missing?
Neo2266 2 months ago
2:00 It’s Schrodinger, as in “Dingus”
Forever Evolving
Forever Evolving 2 months ago
Superposition is possible because of the multiverse.
Anup Gamer
Anup Gamer 2 months ago
You should have sub tital
Paul Gardner
Paul Gardner 2 months ago
One of the best videos you've made!
Dred Cthulhu
Dred Cthulhu 2 months ago
Something I’ve always had an issue with, wouldn’t the cat be able to observe itself? Ergo it’s one or the other, not both. I’m not a physicist so I have no idea. But logically the cat would be the observer right?
johan erik theodor clemmesen
I live in Copenhagen Denmark. It's a super position to be in.
Joey Lochart
Joey Lochart 2 months ago
pilot wave is only theoretical.. across the emptiness of space, the pilot wave is dead.. its like a discontinuous layer between masses.
Joey Lochart
Joey Lochart 2 months ago
electrons resonate when seperated because they were connected, so their wave lengths did interact closely at some point. this would have some cause and effect on their spins that might cause them to resonate, even when further apart and seperated. that's my speculation.
Holl E. H.
Holl E. H. 2 months ago
So when I wish on a star, it gets there at 2 different rates? (Immediately and only at the speed of light?)
Dan Zuck
Dan Zuck 2 months ago
Very clear; nice. Thanks.
Toad Roach
Toad Roach 2 months ago
So if a tree falls over in the woods and there is no one around to see it, has it actually fallen over?
SFaPiL2 3 months ago
I dont know the underlying math in pilot wave theory but, by the way that it's being explained, it reminds me of modal analysis and other studies I've done in signal analysis during my engineering degree. Rather than thinking of the two particles being interlocked independently from space (indicating information travelling at extremely high velocities in order to guarantee their states are interlinked) couldn't it be that they normally match a "wave" which is independent from space itself? A "natural frequency", if you will accept my analogy with modal analysis, where these particles fit in the nodes of such waves; hence retaining a similar behavior as long as they stay fixed to the nodes of this wave independent from time and space. In order for this to be valid, though, an infinite number of particles all fitting in separate nodes of this hypothetical "wave" would all retain the same properties of the particle under test. Does anyone more knowledgeable know whether this analogy I brought up is a load of garbage or not? ;P
Existenceisillusion 3 months ago
2 things. 1) QM properties of individual particles contribute to the QM properties of larger ensembles, and above some threshold ensemble size, the QM properties "smear out" (else we would have to choose which contribute and which don't), resulting in the classical properties we know and love. 2) I think it's Bell's theorem that showed that entanglement is more than just deduction. I.e., if we know there are a total of two states and two particles, and after separating them, we observe one, we subtract the observed state from the list of possibilities, leaving only one state possible, thus not requiring FTL info. Bell's theorem showed this is not true...if I remember right.
Patrick Mcguire
Patrick Mcguire 3 months ago
Our simulation overlords dictate the rules that guide their universe..we are just along for the ride 😂
kiss my dirty ass
kiss my dirty ass 3 months ago
Send me computer free😂😂😂honestly
MJ Music
MJ Music 3 months ago
I’ve said it before and I’ll say it again. It
blubastud 3 months ago
Why does this sound like quantum entanglement?
Hyacinthus 3 months ago
Copenhagen throws out both determinism and locality, Pilot Wave throws out locality. In no way does the Copenhagen interpretation make more sense than Pilot Wave theory.
So... Ockham’s razor?
Next videos