A novel bus design for a highly connected multi-qubit processor in 3D cQED architecture

Highly connected qubit networks offer efficient implementation of quantum algorithms by requiring fewer gates to implement a given circuit. While not considered to be highly scalable, the 3D cQED architecture offers a cleaner microwave environment and modular design which can be used effectively to build small to intermediate scale processors. We will present a novel bus design to couple multiple qubits in 3D cQED with high inter-qubit connectivity and sufficient spatial separation to minimize cross-talk effects. We will show preliminary experimental data to demonstrate qubit interactions using the cross-resonance gate but will also explain how it can be integrated with multiple gate schemes to build scalable multi-qubit processor in 3D architecture.