2025-06-25
LQ 2
IBM Loon: 2 Logical Qubits — First Step on the Fault-Tolerant Roadmap
IBM announced the Loon processor (2025) as the opening milestone of its fault-tolerant roadmap: 2 logical qubits encoded in ~100 physical qubits using a compact code inspired by qLDPC (gross code) architecture, targeting the path to 200 LQ by 2029.