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.

"The difference between a 'very good' and an 'awesome' tennis serve rests on being able to distinguish errors even as tiny as that." Story Source: Materials provided by University of Pennsylvania.

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.

Performance: The dual-rail qubit approach focuses on high fidelity and efficiency per qubit, aiming to achieve better results with fewer qubits compared to traditional scaling methods. Application: ...