Rigetti Computing, Qpho, NQCC announce collaboration

QphoX B.V., Rigetti Computing (RGTI), and the National Quantum Computing Centre, NQCC, announced they have been awarded a multinational grant to perform readout of superconducting qubits using light transmitted over optical fiber. In a recent demonstration, QphoX and Rigetti validated the potential of this technique by optically reading out the state of a single superconducting qubit1. Optical readout is made possible by microwave-to-optical transduction at the base temperature of the cryostat. This transduction process converts the information contained in the microwave readout pulse into an optical signal carried over optical fiber. QphoX, Rigetti and the NQCC are partnering to take the next step in this research to realize optical readout of a fully-fledged superconducting quantum computer. In this multinational collaboration, QphoX will scale its optical qubit readout system that will interface with Rigetti’s 9-qubit Novera QPU, enabling optical readout of all qubits in the processor. The combined system will be installed and operated at the NQCC.