Sabine Hossenfelder @skdh
> Take it from me when I say no nation on this planet is doing strategic planning on quantum computers.
> The big issue needed to be cracked is quantum error correction,
LC--
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> If we can factorise a number sensibly bigger than 15 in my lifetime, I will be impressed
> 30 years from now quantum computers (as promoted in 2020) will still have no impact on practical computing applications.
> Though quantum aspects in materials science could turn out to be useful, so its impact on computing will be of a peripheral nature (in sensors, etc.).
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On 6 Jul 2020, at 14:41, Lawrence Crowell <goldenfield...@gmail.com> wrote:On Monday, July 6, 2020 at 6:46:16 AM UTC-5, John Clark wrote:On Mon, Jul 6, 2020 at 6:19 AM Philip Thrift <cloud...@gmail.com> wrote:Sabine Hossenfelder @skdh> Take it from me when I say no nation on this planet is doing strategic planning on quantum computers.John K ClarkThis may be the case. Quantum computing is interesting, and with the IBM QE I wrote a couple of simple codes to prepare entangled states and to flip them in a Hadamard gate. The QE runs at 50 qubits, which is a narrow path so to speak. It is also an ungainly thing that sits in a cryro-tank. Maybe diamond with nitrogen atoms at specific locations will lead to practical q-computers. The big issue needed to be cracked is quantum error correction, where progress on this in time may lead to more practical quantum computers or processors that might in the future enter into computers. It is possible in a few decades that quantum computers might begin to appear all around us. It will probably take a fair amount of time.Sabine's assessment of quantum metrology over quantum computing is probably correct in the next decade or two.I agree. The work of Kitaev and Friedmann have convinced me that quantum computer will exist, like the theorem of Shannon has shown that telecommunication is possible. Now, the tasks which remain are quite difficult, and I have no idea if this will take some decades, a century or a millenium. If we can factorise a number sensibly bigger than 15 in my lifetime, I will be impressed…, but I have few doubt that in some future, quantum computing will work, probably for the military before the general public. China seems to have already build telephone nets which seems to be quantum secured, although it is hard to verify. Quantum Cryptographic applications will precede computations per se.I am not at ease with what the human will do with such a technology, but that’s another matter.Bruno
LC--
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John K Clark
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On 7 Jul 2020, at 20:05, 'Brent Meeker' via Everything List <everyth...@googlegroups.com> wrote:I thought the big application of QC after encryption, was going to be protein folding and similar biomolecular interactions.
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On 7 Jul 2020, at 20:05, 'Brent Meeker' via Everything List <everyth...@googlegroups.com> wrote:I thought the big application of QC after encryption, was going to be protein folding and similar biomolecular interactions.That is how Feynman discovered quantum computation, in a more informal way than Deutsch quantum universal Turing machine.You thought? What did change your mind? Quantum simulation will be the main application of quantum computations for the millennia to come … once we get genuine big frame quantum computer.I agree with Clark that topological quantum computation is the most long term promising path, but to squeeze an electron and braid its plane moves requires immense apparatus/magnet. The first genuine quantum computing machine might be very huge. That will not easily been miniaturised. But then IBM was using giant trucks to transport for its first 5Mb hard drive in 1955, and I expect huge progress in condoned matter physics, and some serendipitous discovery along the way…Bruno
Brent
On 7/7/2020 4:56 AM, Philip Thrift wrote:
Dr. B may still be right though.
30 years from now quantum computers (as promoted in 2020) will still have no impact on practical computing applications. Maybe in cryptography, or maybe not.
Though quantum aspects in materials science could turn out to be useful, so its impact on computing will be of a peripheral nature (in sensors, etc.).
@philipthrift--
On Tuesday, July 7, 2020 at 5:59:54 AM UTC-5 johnk...@gmail.com wrote:
On Tue, Jul 7, 2020 at 6:44 AM Bruno Marchal <mar...@ulb.ac.be> wrote:
> If we can factorise a number sensibly bigger than 15 in my lifetime, I will be impressed
Back in 2017 the number 291,311 was factored by a quantum computer:
John K Clark
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> I am not sure that adiabatic computation is “real” quantum computation. I have the same problem with quantum annealing,
On 9 Jul 2020, at 13:14, Lawrence Crowell <goldenfield...@gmail.com> wrote:On Thursday, July 9, 2020 at 5:59:04 AM UTC-5, Bruno Marchal wrote:On 7 Jul 2020, at 20:05, 'Brent Meeker' via Everything List <everyth...@googlegroups.com> wrote:I thought the big application of QC after encryption, was going to be protein folding and similar biomolecular interactions.That is how Feynman discovered quantum computation, in a more informal way than Deutsch quantum universal Turing machine.You thought? What did change your mind? Quantum simulation will be the main application of quantum computations for the millennia to come … once we get genuine big frame quantum computer.I agree with Clark that topological quantum computation is the most long term promising path, but to squeeze an electron and braid its plane moves requires immense apparatus/magnet. The first genuine quantum computing machine might be very huge. That will not easily been miniaturised. But then IBM was using giant trucks to transport for its first 5Mb hard drive in 1955, and I expect huge progress in condoned matter physics, and some serendipitous discovery along the way…BrunoGraphene reduces the dimension of QM to 2-space plus time. In effect it is two dimension if the wavelength of quantum states is longer than any atomic thickness to the sheets.
LC
Brent
On 7/7/2020 4:56 AM, Philip Thrift wrote:
Dr. B may still be right though.
30 years from now quantum computers (as promoted in 2020) will still have no impact on practical computing applications. Maybe in cryptography, or maybe not.
Though quantum aspects in materials science could turn out to be useful, so its impact on computing will be of a peripheral nature (in sensors, etc.).
@philipthrift--
On Tuesday, July 7, 2020 at 5:59:54 AM UTC-5 johnk...@gmail.com wrote:
On Tue, Jul 7, 2020 at 6:44 AM Bruno Marchal <mar...@ulb.ac.be> wrote:
> If we can factorise a number sensibly bigger than 15 in my lifetime, I will be impressed
Back in 2017 the number 291,311 was factored by a quantum computer:
John K Clark
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On 9 Jul 2020, at 13:14, Lawrence Crowell <goldenfield...@gmail.com> wrote:On Thursday, July 9, 2020 at 5:59:04 AM UTC-5, Bruno Marchal wrote:On 7 Jul 2020, at 20:05, 'Brent Meeker' via Everything List <everyth...@googlegroups.com> wrote:I thought the big application of QC after encryption, was going to be protein folding and similar biomolecular interactions.That is how Feynman discovered quantum computation, in a more informal way than Deutsch quantum universal Turing machine.You thought? What did change your mind? Quantum simulation will be the main application of quantum computations for the millennia to come … once we get genuine big frame quantum computer.I agree with Clark that topological quantum computation is the most long term promising path, but to squeeze an electron and braid its plane moves requires immense apparatus/magnet. The first genuine quantum computing machine might be very huge. That will not easily been miniaturised. But then IBM was using giant trucks to transport for its first 5Mb hard drive in 1955, and I expect huge progress in condoned matter physics, and some serendipitous discovery along the way…BrunoGraphene reduces the dimension of QM to 2-space plus time. In effect it is two dimension if the wavelength of quantum states is longer than any atomic thickness to the sheets.Interesting. I can conceive this makes sense, but I am not sure this indicates that we could use Graphene for quantum topological computation. I am not sure you could consider the electron of a layer of graphene to be “squeezed” in 2D, at least in a manner so that you can build a braid and get a topological qubit. (I guess that you are not implying that in graphene the electron themselves are confined in a 2D space?).Bruno
LC
Brent
On 7/7/2020 4:56 AM, Philip Thrift wrote:
Dr. B may still be right though.
30 years from now quantum computers (as promoted in 2020) will still have no impact on practical computing applications. Maybe in cryptography, or maybe not.
Though quantum aspects in materials science could turn out to be useful, so its impact on computing will be of a peripheral nature (in sensors, etc.).
@philipthrift--
On Tuesday, July 7, 2020 at 5:59:54 AM UTC-5 johnk...@gmail.com wrote:
On Tue, Jul 7, 2020 at 6:44 AM Bruno Marchal <mar...@ulb.ac.be> wrote:
> If we can factorise a number sensibly bigger than 15 in my lifetime, I will be impressed
Back in 2017 the number 291,311 was factored by a quantum computer:
John K Clark
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