IBM Quantum has successfully operated two 120-qubit Nighthawk R1 processors connected by four meter-scale cryogenic quantum interconnects (L-connectors), achieving average 99.00% state transfer fidelity and 94.75% remote CZ gate fidelity. This achievement represents a critical engineering milestone on the path to modular fault-tolerant quantum computing and establishes the physical foundation for IBM's Quantum Starling processor planned for 2029.
IBM Introduces Meter-Scale Superconducting L-Connectors: Linking Dual 120-Qubit Processors with 99% State Transfer Fidelity
The first multi-channel, meter-scale interconnect architecture meeting the physical connectivity requirements of modular fault-tolerant architecture.