February 13, 2024 10:41 p.m
The world's first fault-tolerant quantum laptop may seem earlier than the top of 2024. American startup QuEra from Harvard College plans to get it up and working. The quantum machine will obtain 256 bodily and 10 logical qubits. The latter reduces the variety of errors in quantum computer systems by storing the identical knowledge elsewhere.
Secure quantum computer systems: what’s the problem?
In accordance with LiveScience, standard computer systems retailer data in bits with the worth zero or 1, whereas quantum computer systems use qubits (quantum bits), through which, along with zero and 1, there’s a third worth within the type of an overlap between them. This permits these computer systems to carry out calculations in parallel moderately than sequentially, as is the case with normal computer systems. And subsequently, quantum computer systems work a lot quicker than normal computer systems.
However the issue is that qubits are extraordinarily unstable in comparison with bits: about one in 1,000 qubits fail, whereas the failure fee of standard computer systems is 1 error in 1 billion billion bits. The excessive failure fee of qubits creates issues with their scaling.
Answer?
QuEra specialists managed to considerably scale back the error fee in qubits because of the so-called quantum correction. Their proposed system relies on knowledge redundancy, the place the identical data is saved in a number of locations. Logical qubits double the calculation processes, and if considered one of them fails, the others can proceed to calculate.
In 2023, Google's Quantum AI Lab demonstrated a 2.9% error fee utilizing three logical qubits. QuEra goes even additional: they’ve an error fee of zero.5% with 48 logic qubits. The world chief thus far stays Oxford College, which has achieved an error stage of lower than zero.01%, however solely between two-qubit modules.
In 2026, QuEra plans to launch a machine with greater than 10,000 bodily qubits and 100 logical qubits, with computing energy anticipated to surpass any present supercomputer.