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Teleporting Schrödinger's Cat

🕑 Added 2017-03-15 14:57:20 +0000 UTC

Comments

Danielle Pajak

Thank you so much for this video! The maths are difficult for me to understand, but I enjoyed it nonetheless. I have a question regarding teleportation, though! I understand that information can't travel faster than light and I understand the no cloning theorem. However, what is exactly going on in this kind of teleportation in regards to causality? If we transfer the cat through this tricky process to the moon, is it happening instantaneously? Does instantaneous mean faster than light? I've been googling all afternoon and I can't seem to find a clear cut answer about quantum teleportation in relation to faster than light travel. If you could help me understanding this, that would be great! Thank you!

omar

I like teleportation method

Henry Reich

Haha, yup, sometimes things from the original script get cut out when I'm editing the video. Normally I catch it before uploading captions, but this video is so long I'm not surprised something fell through the cracks...

Science Mom

Most excellent! My husband and I watched it together and we both chuckled at the intro of the cat (this is the internet). Somewhat random question: there are a couple spots where there are extra words in the closed captions that aren't in the audio (one about using different colors to help the math explanation be clearer). Was that intentional or are the captions from an older script? Curious minds like to know ...

MAC Sandsquid

I'd watched a number of videos on teleportation recently. Most dealt with the "which is real cat" philosophical question. Yours is the first to explain the potential with math(s). I guess this means math(s) can solve all philosophical questions. Who am I? There's an equation for that. Great Job!

Henry Reich

Yeah, that's essentially what happens!

Maur Razimtheth

Wow, I really had trouble following this one. I get the gist of the funny math, indirect observation, but one thing that eluded me was: if you are changing the particles on the moon so that they match the exact configuration of the cat on Earth, wouldn't the particles that were the cat just resemble exactly what was replaced on the moon? Because... entanglement? *scratches head*

Ken Blackman

"If only we had some way we could get there faster..." I see what you did there. :)

pm

Entangled, seems a lot like "contingent". Given that, would it be possible to then have entangled particles entangle OTHER particles, in sort of a tree like structure of dependence? Then you would need less information to infer the structure of the other entangled particles in the tree (this may be similar to the entire teleportation process, I'm not certain, as I don't have the background).

Henry Reich

Look up "Bell Basis" (or the original teleportation paper) if you want to see more

Henry Reich

Yeah, that part kind of makes more sense if I hadn't swept under the rug the fact that in quantum mechanics the phase (+, -, i, etc) matters (for interference, etc).

Henry Reich

Awesome!

Michael

Absolutely love this detailed and thorough explaination! Must take forever to make but I really learned something real! Thanks Henry.

MBETZKIN

I kept getting hung up on the 3rd line (Cat is dead but flea is alive) of the "sneaky" variables. It seems so weird that we would write "They are both the same" and then write RIGHT AFTER "They both are different". It seems totally contradictory until you add in the third line and actually do the math. Pretty cool but very trippy.