IBM's Quantum Leap: Fewer Qubits, Faster Fault Tolerance

IBM unveiled a revolutionary quantum computing architecture drastically reducing the number of qubits needed for error correction. This breakthrough paves the way for their ambitious 2029 goal: delivering Starling, a large-scale, fault-tolerant quantum computer. Utilizing quantum low-density parity check (qLDPC) codes, the new architecture requires only a tenth of the qubits compared to surface codes. IBM's roadmap involves processors Loon and Kookaburra, building towards a modular system culminating in Starling—a 200-logical-qubit machine deployed on the cloud. While challenges remain in qubit coherence times and system integration, this represents a giant stride towards practical quantum computing.