Qubit-resonator gates for co-design quantum computing.

The co-design strategy, where hardware and application-specific algorithms are developed together, is a prime candidate to accelerate reaching quantum advantage and improving connectivity for hardware-efficient problem implementation. At IQM, the co-design architecture is a star-type superconducting quantum circuit using a distributed-element resonator as the central component, coupling to multiple satellite transmon qubits via tunable couplers. This configuration enables high connectivity and allows for the efficient simulation of problems requiring many all-to-all interactions, such as highly connected spin systems [1]. To effectively simulate problems, two topology-specific qubit-resonator operations with fidelities beyond 99% have been developed: a MOVE operation for excitation transport and a CZ-gate for algorithm execution. In this talk, we discuss the experimental progress on the considered gates and report on different metrics which benchmark our results.

[1] Manuel G. Algaba & Mario Ponce-Martinez, et. al., Phys. Rev. Research 4, 043089 (2022).