Consider throwing a ball

straight into the air. Can you predict the motion

of the ball after it leaves your hand? Sure, that’s easy. The ball will move upward

until it gets to some highest point, then it will come back down

and land in your hand again. Of course, that’s what happens, and you know this because you have

witnessed events like this countless times. You’ve been observing the physics

of everyday phenomena your entire life. But suppose we explore a question

about the physics of atoms, like what does the motion of an electron around the nucleus of a

hydrogen atom look like? Could we answer that question based on

our experience with everyday physics? Definietly not. Why? Because the physics that governs the

behavior of systems at such small scales is much different than the physics

of the macroscopic objects you see around you all the time. The everyday world you know and love behaves according to the laws

of classical mechanics. But systems on the scale of atoms behave according to the laws

of quantum mechanics. This quantum world turns out to be

a very strange place. An illustration of quantum strangeness

is given by a famous thought experiment: Schrödinger’s cat. A physicist, who doesn’t particularly

like cats, puts a cat in a box, along with a bomb that has a 50% chance

of blowing up after the lid is closed. Until we reopen the lid,

there is no way of knowing whether the bomb exploded or not, and thus, no way of knowing

if the cat is alive or dead. In quantum physics,

we could say that before our observation the cat was in a superposition state. It was neither alive nor dead but

rather in a mixture of both possibilities, with a 50% chance for each. The same sort of thing happens

to physical systems at quantum scales, like an electron orbiting

in a hydrogen atom. The electron isn’t really orbiting at all. It’s sort of everywhere in space,

all at once, with more of a probability of being

at some places than others, and it’s only after

we measure its position that we can pinpoint where it is

at that moment. A lot like how we didn’t know

whether the cat was alive or dead until we opened the box. This brings us to the strange

and beautiful phenomenon of quantum entanglement. Suppose that instead of one cat in a box,

we have two cats in two different boxes. If we repeat the Schrödinger’s cat experiment

with this pair of cats, the outcome of the experiment

can be one of four possibilities. Either both cats will be alive,

or both will be dead, or one will be alive

and the other dead, or vice versa. The system of both cats

is again in a superposition state, with each outcome having a 25% chance

rather than 50%. But here’s the cool thing: quantum mechanics tells us

it’s possible to erase the both cats alive and both cats dead

outcomes from the superposition state. In other words,

there can be a two cat system, such that the outcome will always be

one cat alive and the other cat dead. The technical term for this is that the

states of the cats are entangled. But there’s something truly mindblowing

about quantum entanglement. If you prepare the system of two cats

in boxes in this entangled state, then move the boxes to opposite

ends of the universe, the outcome of the experiment

will still always be the same. One cat will always come out alive,

and the other cat will always end up dead, even though which particular cat

lives or dies is completely undetermined before we measure the outcome. How is this possible? How is it that the states of cats

on opposite sides of the universe can be entangled in this way? They’re too far away to communicate

with each other in time, so how do the two bombs always

conspire such that one blows up and the other doesn’t? You might be thinking, “This is just some theoretical

mumbo jumbo. This sort of thing can’t happen

in the real world.” But it turns out that quantum entanglement has been confirmed in

real world lab experiments. Two subatomic particles entangled

in a superposition state, where if one spins one way

then the other must spin the other way, will do just that,

even when there’s no way for information to pass

from one particle to the other indicating which way to spin

to obey the rules of entanglement. It’s not surprising then that

entanglement is at the core of quantum information science, a growing field studying how to use

the laws of the strange quantum world in our macroscopic world, like in quantum cryptography, so spies

can send secure messages to each other, or quantum computing,

for cracking secret codes. Everyday physics may start to look

a bit more like the strange quantum world. Quantum teleportation

may even progress so far, that one day your cat will

escape to a safer galaxy, where there are no physicists

and no boxes.

Time does not have a beginning nor end. When you talk about the existence of Time you are making reference to differentiated Time, not about the Singularity of time, as in before the Big Bang. Time exists only as the Reality of the moment, the here and now.

i will hear the explosion of the bomb and thus i will know the cat is dead.wow i am genius……

amazing

If A and B are entangled (showing opposite results)

And C n D are entangled

Would quantum entanglement show that

A is Entangled with both C and D

😶😶

After seeing this animation the scientist would definitely love cats.

So if I put a bomb that has a 100% chance of blowing up, that cat would be dead and alive and I break reality!!!

So two atoms acts on the same pattern despite the distance, but the question is WHICH two atoms? Any random two atoms?

Quantum physics is also like everyday physics, pauli exclusion principle is collision, pilot waves which were said to be like quantum particles are stuck in the wave, causing inertia, as the droplet slides down the wave, and things can move because there is a chance of it sliding away from the center, which is why things stay in motion if not slowed down by friction,

4:21 i think there's a way of information transfer it's just that we haven't discovered that yet

Well schrodingers cat surely has an adventorous life ahead!

Anime cat girls doesn't exist and exists.

cat: (bouncing ball0)

nerd: sotp

Everyone who wants to make some sense of quantum mechanics must know

from the beginning that (a) physicists do not know yet why it works; (b)

there are DIFFERENT interpretations of it – so whoever tells you "I

KNOW" – is a lair. @t

Everyone who wants to make some sense of quantum mechanics must know

from the beginning that (a) physicists do not know yet why it works; (b)

there are DIFFERENT interpretations of it – so whoever tells you "I

KNOW" – is a lair. @t

Everyone who wants to make some sense of quantum mechanics must know

from the beginning that (a) physicists do not know yet why it works; (b)

there are DIFFERENT interpretations of it – so whoever tells you "I

KNOW" – is a lair. @t

please dont use red anymore. it ruins my sight, make me feel headache

Just check it😂

Peta wants to know your locations

A better experiment would be put the dog with the cat instead of the bomb

If bomb will exclude the whole box will explode

This is the best rendition (examples ; explanation) of super-position and entanglement I have ever heard Very well explained …So well… That your almost giving away the whole secret And I do mean this seriously !!!

That physicist is Albert Einstein. Schrodinger preferred poisonous gas.

*Schrödinger has entered the chat*–

*Einstein has exited the chat*Or you could just simply flip a coin. Before you look at it, it exists as heads and tails. Why do they OVER AND OVER.AND OVER AND OVER long windedly explain this sick, dead cat in a box example?

Just fix it with a quantum comb

so, it means when I was in my mothers womb I was in superposition of dead and living, until doctors took the observation.

whats in thebox

Put a camera inside the box and viola .

I’m wondering if it is possible to use quantum entaglement for true instantaneous communication

Very thanks I didn't know what is quantum mechanics

Sounds like schrodenger started quantum mechnics as a joke then other scentists came and proved it

Quantum homework

What can we do, if we knew the cat is alive or dead..?

No cars were harmed in making of this videoAm I overthinking this ?

How quantum mechanics erase the two cats alive and two cats dead outcome?

Please, can someone tell me? I searched Google, but no matching result. 🙁

Didn't get how could the possibilities of the 2 cats alive or both dead can be ruled out. Also is it reason behind two clocks with pendulums synchronise each other some time later

Teacher: Ok now let's talk about how quantum entanglement can be used to increase our nation's gdp

All quantum physicists are Mathematicians

How can any any body can escape to other universe it's like time travel or fastest traveling

3:25 this feels good for some reason

– I mean the effect

아니 이게 뭔 소리야

What do you do if you have 3 cats in 3 boxed and put 1 bomb in each..

every time 2 cats are both dead or alive so entelgagement doesn’t work for these cats

이걸로 수능 국어 그 지문 푸는거임 ㄹㅇ

if they are using bomb then if it explodes doesn't that will create a big noise so without opening also we will come to know the cat is alive or not…….

Then, by this, is quantum immortality possible, i mean if humans r kept in place of cats.. Hmm

Wait why the possibility of both cats being dead or alive together is eliminated???

I love this, S

Heart = Superposition

I think we would know for sure that the cat is still alive if we didnt hear an explosion.

engineering-and-science.com/Schrodinger-equation.html

Damn that cat becomes so powerful in the last that she is too cool to be in our universe………

We can know if that bomb blasted or not we can hear its sound

What if both the boxes were in the part of universe where cat cant surive?..then both the cats will be dead even though there are entangled

What if some lets out the cat(Schrodinger's cat)🤔

The bomb analogy doesn’t work because you’d know the cat was dead if the box blew up before it was opened; has to be silent poisoning.

I went here after watching bunny girl senpai movie lool

Schrodinger's student

Understood the concept,

But completely missed the theory.

"How is it that the states of cats on opposite sides of the Universe can be entangled in this way? They're too far away to communicate with each other in time, so how do the two bombs always conspire such that one blows up and the other one doesn't?"And the answer is… what? Please explain why does this happen?

Quantum mechanics in Endgame: Nope

Quantum mechanics in Bunny Girl Senpai: Yes

This is the video j needed

Why doesn't it work In The macroscopic scale?

Bunny girl rascal has sure given me some knowledge.

Cats : Exists

also cats : Doesn't Exists

i love this cat version :3

Why were the first two options cut out(for the cats either both being alive or dead)?

I had a quantum of hope that I'd understand this stuff…