The No Cloning Theorem

Why you can’t clone Schrödinger’s cat: this video presents the full proof of the “No Cloning” Theorem in Quantum Mechanics – without any fancy math! (stereotypical qubit has been replaced with Schrödinger’s cat).

The full proof relies on the linearity of quantum (aka unitary) transformations, and the tensor product of multiple systems, to show that perfect cloning is impossible (though teleportation is allowed)

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REFERENCES:

And twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Created by Henry Reich
Music by Nathaniel Schroeder

[MinutePhysics]

Hello everyone! I am back from a 2+year comment hiatus and excited to say hi! (my account wasn't linked with any google+ account, so I couldn't comment on YouTube from the MinutePhysics account for the last 2-3 years; google finally gave up on google+ enough that now I can comment on YouTube again!!)

[spartan]

Heisenberg was stopped by the police. The officer asked "Do you know how fast you were going?" Heisenberg responds "No, but I knew EXACTLY where I was."

[thomasr.jackson]

Very mixed feelings in re to format length. Longer and more in depth is great. But I would hate to lose the shorter format that really made your brand. They both serve a purpose. Two channels is probably not a good solution, especially from a business perspective. Perhaps clearly mark each format, perhaps not just by name, (ten minute physics works), but by some distinctive visual clue. This works on other channels that have multiple formats. People can readily pick out the series they want. You can keep separate playlists for those checking out your back catalogue.

[DenisLoubet]

My cloning machine searches the universe for a perfect clone, and teleports it to the user.

[QuarkGamingLLC]

I was gonna make a joke about cloning, but someone might copy it.

Edit: Why did I think this was funny? Its legit a facebook level joke

[Joeobrown]

i once interfered with myself and left a nice pattern on the wall

[dkpsyhog]

Why are you putting a box of unstable gunpowder that may or may not explode at any moment through a cloning machine?

[oneautumnleaf]

Noobs all you need to do is Ctrl + C and Ctrl + V

[ianirizarry]

people that are interested in what you have to say most likely have an attention span that is <60 seconds so yes longer videos would be nice

[coronelkittycannon]

Object a = new Object();
Object b = a.clone();

Ha!!

[inventor]

ngl fam, totally read "no clothing theorem"

[rkiwtir]

I wouldn't mind a hourphysics video!

[Master_Therion]

1:22 "The universe is a party pooper, and perfect cloning is impossible." So, the universe says: No cloning around!

[dylangibson]

I am in a superposition of both liking these videos and really liking these videos.

[danij]

0:29 "There are a few too many atoms of carbon-14 in the new canvas." I loved that one! 😂

[Krysmand]

The long format is really good. CGP Grey +

[TheGurumash]

I like how you used CGP Grey's Icon when talking about an ideal future.

[funky]

Well there's goes my only chance I get to a friend

[TheLordHighNoob]

A 10 minute video! What is this? Christmas?

[Vicioussama]

Really love this more in depth video :)