IBM Quantum Breakthrough: Linking Chips in Real-Time to Expand Qubit Power

Researchers at IBM connected two 127-qubit processors using a real-time classical link, effectively creating a 142-qubit system. By employing dynamic circuits, virtual gates, and cut Bell pairs, they overcame connectivity limits, engineered periodic graph states, and demonstrated that multiple quantum processors can operate together as a single, larger quantum computer with error mitigation.