Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
Pranav Mundada, Gengyan Zhang, Thomas Hazard, Andrew Houck · Physical Review Applied · 2019
No talking! The authors solve the critical scalability issue of multiqubit crosstalk in quantum processors, by harnessing destructive interference. Their architecture involves linking two superconducting qubits with both a bus cavity and a tunable coupler; the tunability enables simultaneous suppression of crosstalk and realization of high-fidelity two-qubit gates. This result paves the way for the next generation of crosstalk-free multiqubit systems.