Jerry M. Chow, Jay M. Gambetta, et al.
Nature Communications
We introduce a new entangling gate between two fixed-frequency qubits statically coupled via a microwave resonator bus which combines the following desirable qualities: all-microwave control, appreciable qubit separation for reduction of crosstalk and leakage errors and the ability to function as a two-qubit conditional-phase gate. A fixed, always-on interaction is explicitly designed between higher energy (non-computational) states of two transmon qubits, and then a conditional-phase gate is 'activated' on the otherwise unperturbed qubit subspace via a microwave drive. We implement this microwave-activated conditional-phase gate with a fidelity from quantum process tomography of ∼ 87%. © IOP Publishing and Deutsche Physikalische Gesellschaft.
Jerry M. Chow, Jay M. Gambetta, et al.
Nature Communications
Jared B. Hertzberg, Antonio D. Córcoles, et al.
DRC 2016
Xie Chen, Hyeyoun Chung, et al.
Physical Review A - AMO
Easwar Magesan, Jay M. Gambetta, et al.
Physical Review A - AMO