IBM Unveils Nighthawk r3 With Plans for 1,040 Qubits
IBM has announced Nighthawk r3, a next-generation quantum processor designed to perform 10,000 operations across 520 programmable qubits. Indeed, the company intends to connect two of these chips in 2027 to form a single system exceeding 1,000 qubits. This scaling advancement relies on interconnect technology that IBM states it has already tested at lower qubit counts.
IBM’s Disclosures
Specifically, Nighthawk r3 maintains the square-lattice connectivity and high-speed operations of the current r2 chip, and incorporates chip-to-chip links that enable a modular system.
The announced specifications for r3 are:
- 520 programmable qubits, with 2,034 total physical qubits per processor.
- Designed to accurately execute 10,000 quantum operations.
- 10 chip-to-chip interconnects, referred to by IBM as l-couplers.
- A plan to link two r3 processors into a 1,040-qubit system by 2027.
Meanwhile, in comparison, the Nighthawk r2, introduced in September, supports over 7,500 operations on 120 qubits and delivers up to 100,000 samples per second. IBM reports that clients, including E.ON, Algorithmiq, and Q-CTRL, have collectively run 34 billion circuits on r2 to date, and have achieved speedups of up to 19x on their specific workloads. E.ON reported a 15x speedup for energy grid optimization. IBM also measured a 12x speedup over earlier Heron work in a magnetic-materials experiment with Oak Ridge National Laboratory, which it claims matched neutron scattering data.
Evaluating the Modular Plan
The 1,040-qubit target is based on connecting two separate processors rather than fabricating one larger die. IBM asserts that it has demonstrated the necessary components. This year, it linked Nighthawk r1 processors using four l-couplers and reported 99.3 percent quantum state transfer fidelity, which falls short of its 99.9% target. It also successfully connected two cryogenic modules into a single system, achieving temperatures below 15 millikelvin in under five days.
What IBM hasn’t yet disclosed for the 1,040-qubit configuration are two-qubit gate fidelities, coherence times, and crosstalk figures across the denser topology. These metrics are crucial for determining whether a high qubit count translates into practical computation and currently remain unreported. The 99.3% coupler fidelity is the only measured transfer metric available, and closing the gap to 99.9% is the stated engineering objective.
IBM is complementing its hardware advancements with its Quantum Platform, which integrates quantum processors with classical high-performance computing for error correction and automated workflows. The company positions these efforts as part of its path toward fault-tolerant quantum computing and its published quantum roadmap.
For additional information on IBM’s scaling plans and independent benchmark tracking, refer to QNews coverage of quantum hardware.