Next, the team switched to what they call a "Carbon code," which requires 30 physical qubits (24 data and six correction/detection), meaning the hardware could only host one.

When too many errors occur the process backs up to the previous guess and takes the other path. In our example, after tracing back, the decoder would take the path dictated by a 00 input.

A new technical paper titled “Error Detection and Correction Codes for Safe In-Memory Computations” was published by researchers at Robert Bosch, Forschungszentrum Julich, and Newcastle University.

Two other established error-detection techniques are checksum (add up all the bits of the entire message, document or program and produce a single sum) and cyclic redundancy check, which operates ...

The solution to this is to use what are called logical qubits, which distribute quantum information across multiple hardware qubits and allow the detection and correction of errors when they occur.