| AVS 65th International Symposium & Exhibition | |
| Materials and Processes for Quantum Computing Focus Topic | Monday Sessions |
| Session MP+AM+EM+NS-MoA |
| Session: | Systems and Devices for Quantum Computing II |
| Presenter: | Jared Hertzberg, IBM, T.J. Watson Research Center |
| Authors: | S. Rosenblatt, IBM, T.J. Watson Research Center J.B. Hertzberg, IBM, T.J. Watson Research Center J. Chavez-Garcia, IBM, T.J. Watson Research Center N.T. Bronn, IBM, T.J. Watson Research Center H. Paik, IBM, T.J. Watson Research Center M.O. Sandberg, IBM, T.J. Watson Research Center E. Magesan, IBM, T.J. Watson Research Center J. Smolin, IBM, T.J. Watson Research Center J.B. Yau, IBM, T.J. Watson Research Center V.P. Adiga, IBM, T.J. Watson Research Center M. Brink, IBM, T.J. Watson Research Center J.M. Chow, IBM, T.J. Watson Research Center |
| Correspondent: | Click to Email |
A key goal in quantum computing is to develop scalable fault-tolerant quantum logic circuits. One promising architecture involves lattices of fixed-frequency transmon qubits coupled via cross-resonance gates. Fixed-frequency qubits offer high coherence and the all-microwave gate reduces circuit complexity. To optimize gate performance, excitation energies of neighboring qubits must be similar but non-degenerate. This architecture is thus sensitive to any variation in device parameters affecting transmon frequency. In this talk we will discuss a statistical model for the resulting ‘frequency crowding’ behavior, and suggest improvements in both architecture design and qubit fabrication in order to achieve scalable circuits with good gate fidelity.
*We acknowledge support from IARPA under Contract No. W911NF-16-0114.