Google takes a crucial step towards large-scale quantum computers: logical qubits

Author: Matthew Sparkes Google’s Sycamore quantum computer Rocco Ceselin Google has proven that its Sycamore quantum computer can detect and repair calculation errors.

Error correction is a standard function of ordinary or classic computers.

In quantum computing, the problem is much more complicated, because each qubit or qubit is in a mixed state of 0 and 1, and any attempt to measure them will directly destroy the data

Julian Kelly of Google AI Quantum and his colleagues demonstrated this concept on Google’s Sycamore quantum computer.

Kelly said that this means that it is possible to create practical and reliable quantum computers in the future

The team has successfully demonstrated this solution conceptually, but there are still huge engineering challenges

In this process, there is a break-even point called the threshold.

Peter Knight of Imperial College London said that Google's research is moving towards what is necessary for future quantum computers

But he said that it will be a huge engineering challenge to truly reach the critical value and establish an effective error correction mechanism, which means building a processor with more qubits than currently available

Journal reference: Nature , DOI: 10.

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