The Quantum Prisoner's Dilemma (ft. Physics Girl!)

Hi! I'm Jade. Subscribe to Up and Atom for new physics, math and computer science videos every second week!

This video was co-written by my super smart hubby Simon Mackenzie.

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*Sources*
The paper I talked about -
Quantum Games and Quantum Strategies Jens Eisert 1 , Martin Wilkens 1 , and Maciej Lewenstein 2 (1) Institut f¨ur Physik, Universit¨at Potsdam, 14469 Potsdam, Germany (2) Institut f¨ur Theoretische Physik, Universit¨at Hannover, 30167 Hannover, Germany (February 1, 2008)

[upandatom]

Hi everyone! Welcome to Up and Atom :) I've received a lot of comments saying the lack of explanation of the Q-move was disappointing. I'm sorry! I'll make sure to fully explain everything I mention in future videos, even if that means including some math. Thank you everyone for the feedback, it's appreciated as I am still learning. Welcome again and I look forward to getting to know you all!

[joshwi]

The best move would be to tell the police that the money in the vault was there until they tried to measure it.

[nathanaelwatt]

"It's not that hard to understand if you just forget everything you know about the world."
This is the probably the most concise and accurate description of what learning quantum mechanics feels like that I've ever heard.

[angeluslupus]

Things I learned: You and Dianna both bought the same prisoner costume, but Dianna either bought, or already had the handcuffs

[yanicyanic]

She turns every video into pure gold!!!
Clear explanation, technically well-finished images, nice in acting.
I love this channel!!

[hydroponikstuttgart]

As far as my understanding goes, superposition doesnt mean that the particle/bit is in both states at once, it means it is on a circle radius 1 in a coordinationsystem like with imagnary numbers. So 1 translates to (1, 0) and 0 to (0, 1). Beeing "in both states" could be interpreted as (0, 707/0, 707) {2^0.5 / 2 } or any other combination resulting in a length as one

[john_gyver]

Great video.
"It's actually not that hard to wrap your head around if ..." - I love that sentence.

[jenseisert]

Wonderfully made video. I am slightly astonished, I must admit, that actual scientific conference talks usually get 300-400 views on YouTube when they are much seen, while this has reached almost 170.000 views. Thanks so much for so nicely covering our work in any case - masterfully done.

[yourlocalclosetedgaybestie]

Came from physics girl. You have an awesome channel. Definitely subscribed :)

[KryssAA]

I hope you will make a more "in depth" video about the q-move.

[walts]

No insight about the Q-move? Disappointing.

[EngineeringNinja]

So they invented a variation on prisoner's dilemma that isn't a dilemma? Without discussing the Q-move or applications of this result in more depth this is pretty underwhelming.

[Heirborn]

Hire a third criminal to break the legs of whoever goes free?

[TheJaguar]

The funniest thing I find about Schroedinger's cat is that he was trying to show the absurdity of the proposed explanation, but it turned out to be right.

[michaelvanwynsberg]

I've never subscribed to anything as quickly and enthusiastically as I have to this. I'm not even halfway done with the first video. I love physical science, I love social science, and I like the branch of philosophy that connects the two: this is awesome!

[kevincraig]

For some sick reason, I laughed so hard at the qubit jumping on her face when she opened the box.

[mdobaidullah]

You are making quantum physics as my daily thought process day by day, thank you very much. Explanation are quite nice.

[monkieassasin]

This is such a good channel. Ive been subscribed for about a month and I am definitely satisfied. Keep up the good work!

[jessesaranow]

Okay, great video, (I subscribed to your channel) but I would like to correct some things that I saw when you showed the payoff matrix, and some terminology that you used about the Nash Equilibrium. First, USE NEGATIVES! This is a very important part of weighing outcomes, especially when it comes to calculating the probability of mixed strategies. Basically, you have positive outcomes and negative outcomes, and 0 is not a positive outcome. You could argue that they are just back where they started, but they actually have a better life then before, considering they are done with the experience.
Now a little bit about the Nash Equilibrium. Yes, what you said is correct, but you are missing one important factor that could clear up some people's confusion (that I know exists, because I had it when I started game theory). What you are using is an iterated game, and especially in this case, it is important to note that a NE is not necessarily the best outcome, just one that is inherently stable.
But great video!

[faizanahemad]

At 1:02, Dianna is wearing some math dress. Where did you get it from Dianna? I want a t-shirt like that.