Scientists take a major step toward quantum computers that correct their own errors

An experiment by Rutgers University, IBM and collaborators used IBM's 156-qubit processor ibm_fez to demonstrate repeated measurement, conditional reset and feedback across chains of up to 100 physical qubits, involving nearly 5,000 entangling gates and 5,000 measurement-and-reset operations. By competing scrambling operations against local measurements and resets, they observed a collective quantum control transition near a 50% control probability, with results matching theoretical predictions and quantum simulations. The work remains a physical-qubit experiment, not a logical qubit or fault-tolerant computation, but it establishes key engineering capabilities for future error-corrected quantum machines.

(Source：The Brighter Side of News)