Two Big Steps Toward the Quantum Computer
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Two Big Steps Toward the Quantum Computer
1–10 of 35 posts
Re: Two Big Steps Toward the Quantum Computer
#2Continuum of Singularity, so to speak.
Re: Two Big Steps Toward the Quantum Computer
#3When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos.
I'm so looking forward to that.
Re: Two Big Steps Toward the Quantum Computer
#4When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
Chances are FTL communication is not possible.
http://curious.astro.cornell.edu/question.php?number=612
http://en.wikipedia.org/wiki/Superluminal_communication
The book, "Why E=mc^2" is an exceptional read. If I recall correctly, it explains why light-speed is a universal limit:
http://www.amazon.co.uk/Why-Does-mc2-Brian-Cox/dp/0306819112
Re: Two Big Steps Toward the Quantum Computer
#5When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
Chances are FTL communication is not possible. http://curious.astro.cornell.edu/question.php?number=612 http://en.wikipedia.org/wiki/Superluminal_communication The book, "Why E=mc^2" is an exceptional read. If I recall correctly, it explains why light-speed is a universal limit: http://www.amazon.co.uk/Why-Does-mc2-Brian-Cox/dp/0306819112
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Re: Two Big Steps Toward the Quantum Computer
#6When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
Chances are FTL communication is not possible. http://curious.astro.cornell.edu/question.php?number=612 http://en.wikipedia.org/wiki/Superluminal_communication The book, "Why E=mc^2" is an exceptional read. If I recall correctly, it explains why light-speed is a universal limit: http://www.amazon.co.uk/Why-Does-mc2-Brian-Cox/dp/0306819112
Mind you, this would imply that the telcos probably can't send data FTL either, so it's all good. :)
Re: Two Big Steps Toward the Quantum Computer
#7When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
how would you entangle the photons in the first place? from what i understand they have to be in close proximity or even emitted from the same source. once entangled, they need to be maintained in this state very very carefully. i think a few hours is the record currently.
to really reap the benefits of entanglement for anything other than microsecond HFT algos, like for human telecommunication, you would need to physically separate these photons by hundreds of thousands to millions of miles. i dont think you can keep them entangled while transporting them that kind of distance.
i could be really really wrong on all of this :)
Re: Two Big Steps Toward the Quantum Computer
#8When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
Quantum mechanics doesn't allow instantaneous communication.
QM does allow some additional forms of spontaneous coordination, like in quantum pseudo telepathy games [1], but there is no communication. There is no back-and-forth decision making, just after-the-fact correspondence.
Unfortunately, the distinction between classical communication and quantum coordination is kind of hard to explain. It has to do with the difference between stochastic and unitary matrices [2].
1: http://en.wikipedia.org/wiki/Quantum_pseudo-telepathy 2: http://en.wikipedia.org/wiki/Unitary_matrix
Re: Two Big Steps Toward the Quantum Computer
#9When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
how would you entangle the photons in the first place? from what i understand they have to be in close proximity or even emitted from the same source. once entangled, they need to be maintained in this state very very carefully. i think a few hours is the record currently. to really reap the benefits of entanglement for anything other than microsecond HFT algos, like for human telecommunication, you would need to phy…
Yeah, not saying this was possible now. But in 10, 20 years?
Perhaps they can be entangled at the factory in the "special room" then kept stable over the next 10 years. That would be enough, no?
Re: Two Big Steps Toward the Quantum Computer
#10When two network quantum chips can communicate instantly (not at speed of light--instantly) over infinite distances, using entangled atoms, then we can ditch the tecos. I'm so looking forward to that.
Chances are FTL communication is not possible. http://curious.astro.cornell.edu/question.php?number=612 http://en.wikipedia.org/wiki/Superluminal_communication The book, "Why E=mc^2" is an exceptional read. If I recall correctly, it explains why light-speed is a universal limit: http://www.amazon.co.uk/Why-Does-mc2-Brian-Cox/dp/0306819112
Stating whether FTL communication is possible at all may require hedging. Stating that it can't occur over quantum superposition does not, as I understand it. The math is clear; there's no information traveling. It does not matter how sophisticated our quantum computers get, there will not be any FTL communication coming out of them.
If we could do that at all, we'd almost certainly be able to to it today, anyhow. We have multi-q-bit QM computers, they just aren't of a practical size for computation. But if FTL communication was possible, it would have been done with them already.