3D integrated superconducting qubits

Abstract

As the field of superconducting quantum computing advances from the few-qubit stage to larger-scale processors, qubit addressability and extensibility will necessitate the use of 3D integration and packaging. While 3D integration is well-developed for commercial electronics, relatively little work has been performed to determine its compatibility with high-coherence solid-state qubits. Of particular concern, qubit coherence times can be suppressed by the requisite processing steps and close proximity of another chip. In this work, we use a flip-chip process to bond a chip with superconducting flux qubits to another chip containing structures for qubit readout and control. We demonstrate that high qubit coherence ($T_1$, $T_{2,\mathrm{echo}}>20\mu$s) is maintained in a flip-chip geometry in the presence of galvanic, capacitive, and inductive coupling between the chips.

References in corpus (22)

• Surface codes: Towards practical large-scale quantum computation
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• State preservation by repetitive error detection in a superconducting quantum circuit
• Coherent Josephson qubit suitable for scalable quantum integrated circuits
• Topological Quantum Distillation
• The Flux Qubit Revisited to Enhance Coherence and Reproducibility
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
• Procedure for systematically tuning up crosstalk in the cross resonance gate
• 10-qubit entanglement and parallel logic operations with a superconducting circuit
• Surface participation and dielectric loss in superconducting qubits
• Detecting bit-flip errors in a logical qubit using stabilizer measurements
• Scalable quantum circuit and control for a superconducting surface code
• Fabrication Process and Properties of Fully-Planarized Deep-Submicron Nb/Al-AlOx/Nb Josephson Junctions for VLSI Circuits
• Characterizing errors on qubit operations via iterative randomized benchmarking
• Suppressing relaxation in superconducting qubits by quasiparticle pumping
• Fault-Tolerance of "Bad" Quantum Low-Density Parity Check Codes
• Coherent coupled qubits for quantum annealing
• Restless Tuneup of High-Fidelity Qubit Gates
• The Quantum Socket: Three-Dimensional Wiring for Extensible Quantum Computing
• Extensible 3D architecture for superconducting quantum computing
• Remote Sensing and Control of Phase Qubits

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