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originally posted by: proximo
originally posted by: GraffikPleasure
originally posted by: TEOTWAWKIAIFF
a reply to: seasonal
I think quantum computers will, at first, be something that only nations have (they are that finicky and expensive to operate) . You still need your "classical" computer to connect to the quantum computer (you will not have one on your desk anytime soon). So don't shoot just yet!
This announcement is kind of like an appetizer of what is coming. Next year will be the real race for supremacy.
Please explain further why they keep making these better without releasing a lesser version to the public?
They cost millions, and you have to be a math genius to program one.
Basically a 50 qubit system is inferior to a laptop anyway, but once the qubit start getting into the thousands, then they will quickly become much more powerful than supercomputers for certain types of problems.
a reply to: TEOTWAWKIAIFF
There is also the stability issue (called "coherence" in quantum computing land) but I forget exactly how long that also has to be to have supremacy (you need both qubits and coherence over time to truly have quantum supremacy).
Using freely available pyQuil software, a library designed for producing programs in the quantum instruction language, the researchers wrote a code that was sent first to a simulator and then to the cloud-based IBM QX5 and Rigetti 19Q systems.
The team performed more than 700,000 quantum computing measurements of the energy of a deuteron, the nuclear bound state of a proton and a neutron.
A challenge of working with these quantum systems is that scientists must run simulations remotely and then wait for results. ORNL computer science researcher Alex McCaskey and ORNL quantum information research scientist Eugene Dumitrescu ran single measurements 8,000 times each to ensure the statistical accuracy of their results.
“It’s really difficult to do this over the internet,” McCaskey said. “This algorithm has been done primarily by the hardware vendors themselves, and they can actually touch the machine. They are turning the knobs.”
The team also found that quantum devices become tricky to work with due to inherent noise on the chip, which can alter results drastically. McCaskey and Dumitrescu successfully employed strategies to mitigate high error rates, such as artificially adding more noise to the simulation to see its impact and deduce what the results would be with zero noise.
“These systems are really susceptible to noise,” said Gustav Jansen, a computational scientist in the Scientific Computing Group at the Oak Ridge Leadership Computing Facility (OLCF), a DOE Office of Science User Facility located at ORNL. “If particles are coming in and hitting the quantum computer, it can really skew your measurements. These systems aren’t perfect, but in working with them, we can gain a better understanding of the intrinsic errors.”
At the completion of the project, the team’s results on two and three qubits were within 2 and 3 percent, respectively, of the correct answer on a classical computer, and the quantum computation became the first of its kind in the nuclear physics community.
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