IBM Unveils Nighthawk r3 Quantum Processor with 520 Programmable Qubits

Huo Xing Cai Jing reports that IBM has announced its next-generation superconducting quantum processor, IBM Quantum Nighthawk r3, designed to accurately perform 10,000 quantum operations on 520 programmable qubits. The processor includes 2,034 physical qubits, continuing the square lattice connectivity and fast-operation architecture of Nighthawk r2, while adding 10 new chip-to-chip interconnects called l-couplers. IBM plans to connect two Nighthawk r3 processors into a single 1,040-qubit system by 2027.

The Nighthawk r2 currently in use features 120 programmable qubits, 218 couplers, and 120 reset elements, capable of executing over 100,000 circuits per second, with a throughput approximately 25 times that of Heron and up to 19 times faster for partner workloads—E.ON reported a 15-fold improvement. Previously, IBM connected two Nighthawk r1 processors using four L-couplers, achieving a maximum quantum state transfer fidelity of 99.3% and an average of 99%; the two connected cryogenic modules reached below 15 millikelvin within five days.