Author(s): Hanhee Paik, A. Mezzacapo, Martin Sandberg, D. T. McClure, B. Abdo, A. D. Córcoles, O. Dial, D. F. Bogorin, B. L. T. Plourde, M. Steffen, A. W. Cross, J. M. Gambetta, and Jerry M. Chow
A quantum phase gate that reduces the need for frequency matching is implemented using four superconducting qubits in a three-dimensional architecture, overcoming a scaling hurdle for these devices.

[Phys. Rev. Lett. 117, 250502] Published Tue Dec 13, 2016