Quantum Motion Unveils Potentially Scalable Qubit With 9-Second Quantum State Lifetime
takyon writes:
Quantum Motion unveils 9-second silicon qubit
Quantum Motion, a four-year-old UK-based startup is today announcing a quantum computing breakthrough, demonstrating that a stable qubit can be created on a standard silicon chip, similar to those used in smartphones.
[...] Even chipmaker Intel, which is testing a similar silicon-based approach in collaboration with Delft-based startup QuTech, talks about times of 1 second - and this is several orders of magnitude longer than what has been achieved by quantum companies using the superconducting approach.
[...] But more importantly, if the silicon approach works, the quantum computer industry would not have to build a new set of chip foundries - they could use the infrastructure that is already there. It would also be easier to combine quantum and classic computers if both use the same silicon chip and transistor architecture.
[...] Some of the quantum computing technologies may also be quite bulky when you scale up to multiple thousands of qubits. But in theory, a million of Quantum Motion's electron-spin qubits could be packed onto a 1cm square chip. You would still need the elaborate chandelier-like refrigerator to keep the chips at a fraction of a kelvin above absolute zero, but just one such refrigerator - similar in size to a server rack - can hold many chips.
Also at TechRadar.
Journal Reference:
Virginia N. Ciriano-Tejel, Michael A. Fogarty, Simon Schaal, et al. Spin Readout of a CMOS Quantum Dot by Gate Reflectometry and Spin-Dependent Tunneling [open], PRX Quantum (DOI: 10.1103/PRXQuantum.2.010353)
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