IBM says Nighthawk r2 reaches 100,000 quantum circuits per second

Between two quantum calculations, IBM’s Nighthawk r2 can reset its qubits instead of waiting through the hundreds of microseconds a full reset can require. The processor reaches 100,000 circuits per second, IBM says, with the idle time between runs reduced to as little as one microsecond.

The bottleneck is the conditional reset: qubits must return to their ground state before the next round of computation. IBM replaces it with a dissipative reset gadget, in which a high-dynamic-range coupler pulls a programmable qubit to its ground state on demand. The processor reduces a qubit’s T1—the time it holds its energy—from 200 microseconds to about 25 nanoseconds. Each qubit is connected individually to the coupler, so it can be reset without disturbing its neighbors.

Speed alone would not help if it multiplied errors. IBM says the faster reset reduces initialization errors by 25x, because the system starts from the ground state each time. Nighthawk r2 also uses a square-lattice architecture, in which most qubits connect to four nearest qubits, and the reset can be used during execution as well as between circuits.

The processor is one step on IBM’s longer roadmap, not its endpoint. Nighthawk r2 has more than 7,500 gates in 2026; IBM’s stated milestones include a fault-tolerant computer with over 100 million gates running on 200 qubits, followed by a system with a billion circuits and over 2000 qubits by 2033.

Concretely, researchers with access to IBM’s Quantum Platform could run more workloads within the same allocation, while spending less time waiting for circuits to restart. The performance figures are IBM’s reported results, and the source does not describe an independent benchmark; the immediate advance is faster, more efficient access to the processor, not the arrival of the fault-tolerant machines on the roadmap.