Відео

На мой арифметически простой взгляд, Сфера Блоха - это *не* физический объект. Можно сказать, что это условное вспомогательное мнемоническое представление о характере взаимодействия физических объектов. Природа не оперирует подобными трансцендентными представлениями. Поэтому на их основе невозможно строить логически правильные умозаключения о практической реализации этих представлений. 09.09.2024.

Gonzalez Jessica Rodriguez Christopher Hall Dorothy

Davis George Rodriguez Paul Johnson Helen

Johnson Kevin Garcia Deborah Garcia Edward

White John Thompson Maria Robinson Maria

any body explain why x.y=(a,b) mod2 every time why not x.y=a.b

Perez Lisa Lewis Barbara Taylor Ronald

Dear professor, This course was really interesting and gave me a good intuition of many concepts in the field. Your explanations were crystal clear. There were some areas where I found it hard to understand but that was because of my limited background in physics (concepts like Larmor precession and spin control). But for the most part, this course gave me valuable insight to Quantum Computing and Quantum algorithms. Thanks much again!

I assumed these matrices are used as quantum gates, but now we use it as observables that return results (eigenvalues) But doesn't measuring a system collapse the superposition? How can we use these as quantum gates?

So qubits are continuously changing state (relative phase) even when no operation is performed on them with high frequencies like 10^15 Hz? How can these be used in computation?

why e power i phi sub zero is not considered and it is dropped? some one explain pls.

the first thing to be explained is the magnitude of the force qv X B and its direction, and then the magnitude of the electron magnetic moment force. Without explaining the size of qv X B it is hard to understand the Stern Gerlach experiment.

Useless video.

Ok sir

It would be more interesting to understand how quantum violates ECTT

went totally over my head lmao

Um..... Primes is in P. Also Integer Factorization is NP Indeterminate. It is NOT "in" BQP. It could very well be in BPP, some clever fellow could find a fast probabilistic algorithm for it. Actually Rabin (of the Miller-Rabin algorithm) researched that for a while.

Beautiful explanation!

Waaaaaw, after one month reading 10s of documents, watching UA-cam tutorials, I want to tell you just, you are the best one! This is the only convincing video about Grover algorithm, now I got it (excellent), thank you so much

I understood up to Uf but then after the Hadmard transform without measurement what is the state?

I have tried many different resources to understand this algorithm and yours is by far the best explanation! Thanks

I'm impressed with Prof Vazirani, he's one of the best teachers I ever seen, but I didn't really get the point of this video. He shows a trick to reduce the FFT's circuit complexity from O(n^2) to O(n.log N), I can memorize that trick, but I'm not sure this was the intent of this lesson...

Question: How can Bob know Alice's coordinate system, i.e. the two orthogonal directions in space which she uses? He must know that in order to choose his own basis, which is supposed to differ π/8 from hers. But there is no preferred spatial direction in the universe he could possibly use to correctly deternine his or her coordinate system.

I thought so. Thankyou for going right to the matter.

KRISHNA is the creator of quantum mechanics! hare krishna

Who can explain why we can not implement exact gate with universal gates? Why only on limit we will get the same gate?

7:40 why isn't it (d/dx)^2 but (d^2/dx^2) . what does squaring a operator(momentum) mean? Is it Applying operator twice?? Why?

Thank you for this video🙏

Is there some obvious reason for using 45 degrees to define the sign basis?

Hxxh I mean = hh

Does H X X H = Hh?

1:49 how could u clone X? This doesn't obey no cloning thereom.

4:16 There is a way! Take a=0, b=1. Hence a^b = 0. If second output is b we will know it is 1. Only way a^b =0 (considering b=1) is a=0. Hence reversible.

Seems like someone needs to learn how to give a better explanation that makes sense or at least gives some back ground to the actual experiments instead of ignoring how this is misapplied to how polarizes lenses filter light. It's like they purposely ignored how force vectors work and how the polarization vector changes direction each time the light goes through the filter. The filter changes the light each time. This actually seems to suggest local realism is actually real because the Bell Inequality only works if they have some information that isn't changed by the filter, but we know the light that comes out of the filter is altered and polarized in the direction the filter allows through and is related to the force vector direction of the polarization. So I still don't understand how this proves anything about fundamental particles not having any information already. This how sailors tack into the wind and actually use the wind to push them in the opposite direction by moving at 45 degree angles to it. Force Vectors! Are we to pretend the wind doesn't have a direction until someone sets sail? I have never found a satisfying explanation of this that explains why vectors don't explain this. Here is another example that is at least showing some of the experiment, but still ignoring how force vectors work. ua-cam.com/video/zcqZHYo7ONs/v-deo.html I just wish someone had a "GOOD" explanation. How can all of these smart people keep ignoring the obvious question?

Thanks; yessirski

If the second Q-bit is |1> and 1st Q-bit is |+>, technically, no operation is done on the third Q-bit, and it is apparently in complete isolation from the system in Alice's lab. How amazingly still it changes to |psi>? POV: I realised that they are separate in all cases, not only in 0,0.

big data please recommend me more lectures like this.

best explanation

Isn't here x=2 the best option just becouse it won't divide the multiplication of primes ever (unless N is even where we dont need quantum computing)

Why i come with y- direcion

Dear sir why we not use sii) relation for z_direction ?

Idc

Hello! Thank you for all this excelent videos. I have a question: When you say that you apply de H inverse transfor for the entire sum except the | - > bit, I understand that you can apply the H transform to the bits you want but how can the (-1)^fx be in that transformation with the | x> bits and not "stay" with the | - > bit. I don't know if what I say even makes sense :)

Excellent explanation, thank you so much! I was confused for the longest time as to why this algorithm works but you made it seem simple =)

Idk how he came up with an upper bound of 3/4 probability for the classical case

Dear Professor, thanks for sharing your great thoughts on many otherwise hard to understand concepts. It was really helpful and I enjoyed it!

I want contact of umesh vazirani ji.

what limits reversibility in electrical and optical systems?

Dear professor, As a beginner of quantum computing study, I have watched and studied the every episode of this course over the videos, many times repeatedly examining the hard points. To be honest, I have been really enjoyed the course, and would like to recommend it to anyone who is interested in quantum computing. So, the special thanks for your excellent teaching and your team members who have made contributions to the wonderful course. Best wishes to you and your team.

it is very very clear. Thanks for the explanation