Quantum LDPC codes offer a substantial reduction in qubit overhead for fault-tolerant quantum computation, thanks to their high encoding rate, but operating on multiple logical qubits within the same block can be challenging. Researchers propose an approach using cat states and a scheduler code for the joint measurement of commuting logical operators, achieving a nearly 3× speed-up with LDPC codes Q70 and Q102.
CliNR Quantum LDPC Codes Unlock 3× Faster Joint Logical Measurements
Quantum LDPC codes offer a substantial reduction in qubit overhead for fault-tolerant quantum computation, thanks to their high encoding rate, but operating on multiple logical qubits within the same block can be challenging. Researchers propose an approach using cat states and a scheduler code for the joint measurement of commuting logical operators, achieving a nearly 3× speed-up with LDPC codes Q70 and Q102.