Rigetti Computing, Inc. announced that its 84-qubit Ankaa?-2 quantum system was made publicly available to all of its customers via Rigetti?s Quantum Cloud Services (QCS?) on December 20, 2023. The Ankaa-2 system is based on Rigetti?s fourth generation chip architecture that features tunable couplers and a square lattice, enabling high fidelity 2-qubit operations compared to the Company?s previous systems. Ankaa-2 is also the Company?s highest qubit count quantum processing unit (QPU) available to the public. Following the internal deployment of Ankaa-1, the Company made iterative improvements through internal R&D to support enhancements to Ankaa-2. As a result, Ankaa-2 achieved a 2% median 2-qubit gate error rate ?

less than half the error rate of the Company?s previous systems. These fidelity improvements can be attributed to a variety of technology updates to the Ankaa-2 system: Implementation of a new chip fabrication process, leading to qubits with fewer atomic defects that would otherwise reduce quantum coherence times, Incorporation of new superconducting PCB technology that improves thermal performance, Electronics improvements that generate control signals with less noise.