Essence of Quantum Computation - Seth Lloyd

[kearnuphoenix]

Hi, Serious Science. I would like to share your video via the Facebook Video platform. Can I upload it as a Facebook Video and properly credit you? Thanks

[nikolaevryyysa]

I wonder if particle-wave duality would be able to describe his hair in windy conditions

[amikomalania]

""This is just weird and counterintuitive. There is no classical intuition that coresponds something like, socerball being here and there simultaneously even if messi can look like that every now and then"

[VR_Wizard]

Dose that mean the qcomputer calculates the two calculations seperatly and gives me back one result containing both solutions. And dose thet mean if I put in more calculations I get a result with all the solutions mixed together? If so can I refer from the mixed results the result of every single calculation? I thing I still don't understand how that works.

[loujagerman]

Wave-particle duality is not so enigmatic if you add the concept that the waves in question are WAVES OF PROBABILITY. Dr. Lloyd almost says this when he mentions locations of electrons, but then he backs away from going far enough: There is a PROBABILITY that the electron is at some point (e.g. "here") but this probability can fluctuate; if so, it fluctuates in a WAVY fashion. The electron doesn't turn into a wave, and there is no "duality" between the electron and its wave. The probability of finding that electron "here" or "there" is what does the waving! Meanwhile, the location of the eIectron is a quantum state, as is its spin, which is useful in quantum computing. Thus, in the equation for superposition of the spin-states of an electron, you may find up-spin multiplied by a probability P (by a probability amplitude to be exact, the square root) PLUS (+) down-spin multiplied by a probability amplitude, all divided by 2. And indeed if you measure the spin repeatedly, you will find up-spin 50% of the time and down-spin 50% of the time. Now it's possible, and at times critically important, to alter the probability amplitudes (as long as the sum of all P's is 100% [normalized]) so as to favor one direction of spin over the other. Then upon measurements the "wave" will have two unequal fluctuations, but it's the P's that have undulated.

[naimulhaq]

QC occurs in nature, our five senses, our brain and all our cells have QC capabilities. Instead if semiconductor transistors with three terminals reading out 0 and 1, nature employs amplifiers with multiple terminals which can read out intermediate states, Qubits, occurring in nature. I wonder why Bell Laboratory doesn't study these systems in details.

[cypressmaccarthy]

What's the time, what is the time mean for quantum?

[TCA]

I think we can put everything aside and rely on the evidence.

[osmositeequilibria]

"more impressive considering he said it in danish". Uh no - the guy was Danish. If an American scientist such as your good self said it in Danish, now that would be impressive.

[zaidsserubogo]

Quantum fluctuations prove that quantum mechanical law is just a special case of a general law. In this case the complexity principle- even Alan Turing, Gödel, Hilbert, von Neumann and the like giants of computer revolution knew this as far as early 20th century.

[Quantumcollapsepodcast]

Hey Seth, Stop Computing The Universe Please. Thank You. <3

[TCA]

A quantum computer has done nothing other than 3 times 5 and the answer was wrong

[TCA]

the evidence suggests that quantum computers are beyond our technology.


Seth is misleadgnd you here

[nikolaevryyysa]

I wonder if particle-wave duality would be able to describe his hair in windy conditions