Integrating superconducting quantum technology from the bottom up*

In the past decade, quantum system integration has driven innovation in device fabrication while balancing processes that could be detrimental to quantum information, like loss, noise, and decoherence. Today the thrust to connect and exploit the quantum in different physical realms is driving hybridization of basic superconducting (SC) components with a progressively broader set of devices. These integrated structures serve as resources for a growing quantum device toolbox and could be used for building future quantum networks, scaling quantum information processors, or studying basic quantum science.

We show how our early work to understand sources of decoherence in SC circuits led to the development of various key components: improved connectivity in SC circuits, microscopic opto-mechanical devices, and electro-optical quantum transducers for connecting disparate quantum systems from the microwave to the optical. In this talk, I will review how these advances were serendipitously interrelated, while providing details in how these types of devices are designed and manufactured. In particular, I will highlight some of our more recent advances in developing SC parametric circuits that go beyond just the useful amplification of signals. This work further extends the reach of SC quantum technologies for improving measurements and performing computations.