Zhancheng Yao, Martin Sandberg, et al.
Applied Physics Letters
The resonator-induced phase (RIP) gate is an all-microwave multiqubit entangling gate that allows a high degree of flexibility in qubit frequencies, making it attractive for quantum operations in large-scale architectures. We experimentally realize the RIP gate with four superconducting qubits in a three-dimensional circuit-QED architecture, demonstrating high-fidelity controlled-z (cz) gates between all possible pairs of qubits from two different 4-qubit devices in pair subspaces. These qubits are arranged within a wide range of frequency detunings, up to as large as 1.8 GHz. We further show a dynamical multiqubit refocusing scheme in order to isolate out 2-qubit interactions, and combine them to generate a 4-qubit Greenberger-Horne-Zeilinger state.
Zhancheng Yao, Martin Sandberg, et al.
Applied Physics Letters
Martin Sandberg, Emanuel Knill, et al.
Quantum Information Processing
Jan Hermann, James Spencer, et al.
Nature Reviews Chemistry
Nathalie P. de Leon, Kohei M. Itoh, et al.
Science