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Fat Harrys Cat

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18/01/23

13:54

Post #: 65753086
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Originally posted by Tonza: ↑

Followed a link to their tech and it's operating at 1.5 Kelvin ( - 271.65 degrees Celsius)
So not room temp .. far from it!

But this is great for Quantum Cloud computing - it promises to scale up quickly and advance Quantum Tech also great for Australia.
As I've said before, there is room for several technologies as in time this will be a huge industry ... another thing to take from the article is how advanced Australia is in this field - I just hope it stays here!

nature.com/articles/s41586-020-2171-6
Operation of a silicon quantum processor unit cell above one kelvin
Abstract
Quantum computers are expected to outperform conventional computers in several important applications, from molecular simulation to search algorithms, once they can be scaled up to large numbers—typically millions—of quantum bits (qubits)^,,. For most solid-state qubit technologies—for example, those using superconducting circuits or semiconductor spins—scaling poses a considerable challenge because every additional qubit increases the heat generated, whereas the cooling power of dilution refrigerators is severely limited at their operating temperature (less than 100 millikelvin)^,,. Here we demonstrate the operation of a scalable silicon quantum processor unit cell comprising two qubits confined to quantum dots at about 1.5 kelvin. We achieve this by isolating the quantum dots from the electron reservoir, and then initializing and reading the qubits solely via tunnelling of electrons between the two quantum dots^,,. We coherently control the qubits using electrically driven spin resonance^,in isotopically enriched silicon²⁸Si, attaining single-qubit gate fidelities of 98.6 per cent and a coherence time of 2 microseconds during ‘hot’ operation, comparable to those of spin qubits in natural silicon at millikelvin temperatures^,,,. Furthermore, we show that the unit cell can be operated at magnetic fields as low as 0.1 tesla, corresponding to a qubit control frequency of 3.5 gigahertz, where the qubit energy is well below the thermal energy. The unit cell constitutes the core building block of a full-scale silicon quantum computer and satisfies layout constraints required by error-correction architectures^,. Our work indicates that a spin-based quantum computer could be operated at increased temperatures in a simple pumped⁴He system (which provides cooling power orders of magnitude higher than that of dilution refrigerators), thus potentially enabling the integration of classical control electronics with the qubit array^,.

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Well done Tonza!
It’s a Gold Star and an Elephant Stamp for you!

Thank you for following up with your research.
So they aren’t a direct competitor for Archer.
Still be interested to learn if there is anything of theirs that could benefit us (for instance, qubit readout technology?)

cheers

FHC

AXE Price at posting: 64.0¢ Sentiment: Hold Disclosure: Held
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Well done Tonza!It’s a Gold Star and an Elephant Stamp for you!...

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Well done Tonza!It’s a Gold Star and an Elephant Stamp for you!...

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