Rigetti's 36-Qubit Modular Quantum Leap Cuts Error Rates by 50%, Stock Rises 5%

Rigetti Computing (NASDAQ: RGTI) caught some upside momentum after unveiling what it calls the largest multi-chip quantum computer in the industry. The stock jumped roughly 5% following the reveal of its modular 36-qubit system that slashed error rates in half compared to its last-generation 84-qubit single chip.

The new setup is built by combining four 9-qubit "chiplets," a departure from monolithic quantum chips, showing a clear push toward scalability through modular design. Rigetti hit a median two-qubit gate fidelity of 99.5% on this rig, which essentially means it's closer to reliable quantum operations - a major hurdle in the field.

To put that in context, going from their earlier 84-qubit Ankaa-3 system to this 36-qubit multi-chip platform actually reduced the median two-qubit gate error rate by half. That's no small feat in a domain where tiny error percentages can throw entire calculations off track.

CEO Dr. Subodh Kulkarni highlighted Rigetti's advantage with superconducting qubits. He noted their gate speeds outpace alternatives like ion traps by a factor of 1,000 or more, which could be a game-changer if the company nails down both velocity and scalability. Rigetti is aiming to launch this system by mid-August and hopes to push beyond 100 qubits using their chiplet architecture before the year's end - keeping the fidelity figure steady.

They've been running controlled-Z (CZ) gates, a common two-qubit operation, which share computational equivalence with iSWAP gates often used in other quantum setups. More technical details will emerge with their Q2 2025 operating update, expected to reveal how these multi-chip systems perform in real-world conditions.

With the quantum computing race heating up, Rigetti's move to modular chips with solid fidelity numbers stands out. Still, the company has plenty to prove before these advances turn into commercial breakthroughs. But for now, traders noticed the progress and gave RGTI a bump on the charts.