Quantum error correction goes well beyond breakeven
A demo of error-corrected qubits shows big reductions in errors as they grow.
Quantum error correction is making strides beyond the point where adding more qubits would make performance worse. Logical qubits, which involve linking hardware qubits together to detect and rectify errors, are promising. However, the more hardware qubits allocated to each logical qubit, the higher the likelihood of errors occurring due to their inherent susceptibility to mistakes. If the hardware error rate proves excessively high, expanding logical qubit size may exacerbate the issue.
Quantinuum, a company specializing in quantum computing, has unveiled its latest generation of hardware that can scale well beyond the breakeven point. This advancement is significant as it signifies that performance improvements surpass mere factors of ten when the size of logical qubits increases. Each subsequent step up in logical qubit size results in a marked enhancement in certain performance metrics.
Despite this promising development, the improvement in performance does not seem to be very dramatic. To achieve the necessary error rates for running intricate algorithms, an astronomical number of qubits would be required per logical qubit – a feat deemed impractical.
Written by urgent.news from Ars Technica's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
