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+--- Thread: Underdog technologies gain ground in quantum-computing race (/thread-13614.html)
Underdog technologies gain ground in quantum-computing race - C C - Feb 7, 2023
https://www.nature.com/articles/d41586-023-00278-9
INTRO: The race to build practical quantum computers might be entering a new phase. Some of the front-runner technologies are now facing size constraints, and others are rapidly coming up from behind.
For years, two leading approaches have enabled physicists to make progress partly by cramming devices with more and more qubits, the quantum equivalent of a computer’s memory bits. One of those methods encodes qubits as currents running on superconducting loops. The other uses excited states of individual ions trapped in a vacuum by electromagnetic fields.
But in the past two years, qubits that consist of single neutral atoms — as opposed to ions — and are held with ‘tweezers’ made of laser light have suddenly become competitive. And other techniques that are at an even earlier stage of development could yet catch up.
“Superconducting qubits and trapped-ion qubits have done the most-advanced experiments, with the most qubits under control,” says Barbara Terhal, a theoretical physicist at QuTech, a quantum-research institute at the Delft University of Technology in the Netherlands. “However, this is no guarantee that these platforms will stay in the lead.” (MORE - details)
RE: Underdog technologies gain ground in quantum-computing race - Zinjanthropos - Feb 7, 2023
When out west in Burnaby BC visiting my daughter and the grandkids I sometimes drive by D-Wave, a Canadian quantum computer maker. Hard to believe there’s a room in that building, not sure how small, where the temperature is at 15 millikelvin which apparently is 18 times colder than deep space
RE: Underdog technologies gain ground in quantum-computing race - Kornee - Feb 8, 2023
(Feb 7, 2023 07:11 PM)Zinjanthropos Wrote: When out west in Burnaby BC visiting my daughter and the grandkids I sometimes drive by D-Wave, a Canadian quantum computer maker. Hard to believe there’s a room in that building, not sure how small, where the temperature is at 15 millikelvin which apparently is 18 times colder than deep space2.7K/0.015K = 180. So only one order of magnitude out.
RE: Underdog technologies gain ground in quantum-computing race - Zinjanthropos - Feb 8, 2023
(Feb 8, 2023 03:25 AM)Kornee Wrote:(Feb 7, 2023 07:11 PM)Zinjanthropos Wrote: When out west in Burnaby BC visiting my daughter and the grandkids I sometimes drive by D-Wave, a Canadian quantum computer maker. Hard to believe there’s a room in that building, not sure how small, where the temperature is at 15 millikelvin which apparently is 18 times colder than deep space2.7K/0.015K = 180. So only one order of magnitude out.
Like the WWII fighter pilot who couldn’t shoot straight, “ Missed a Zero “
RE: Underdog technologies gain ground in quantum-computing race - Kornee - Feb 8, 2023
(Feb 8, 2023 04:22 AM)Zinjanthropos Wrote: Like the WWII fighter pilot who couldn’t shoot straight, “ Missed a Zero “And if said ace had an onboard working quantum computer (keeping this right on topic!) to do the automatic aiming, might have insured against himself being zeroed out. Progress.
