A Co-Design star-architecture superconducting chip

When quantum algorithms are implemented on practical quantum computers, the qubit routing problem which maps the physical qubit connectivity of the device to the qubit connectivity of the algorithm is a major hurdle. Solving the problem requires finding a pattern of SWAP gates that maps the connectivities to each other. For performing computations on NISQ devices, this problem must be solved with maximum efficiency, such that the number of SWAP gates is minimized.

 

This talk presents a scalable superconducting chip design made using KQcircuits, that generates a star-architecture chip with an effective central qubit coupled to neighbouring qubits. A first generation chip composed of 6 transmon qubits coupled to a co-planar waveguide resonator via tuneable couplers is presented and a path to scaling is shown. The design reduces on the order of 90% of SWAPs needed to simulate an all-to-all interacting spin system of 50 qubits.

 

This talk shows a superconducting QPU chip designed in particular for simulating highly connected spin systems, such as those discussed in the talks “Simulating nanoscale NMR problems on a co-design quantum computer, parts I & II”.