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Experimental Quantum Information

We design, fabricate, and measure superconducting circuits to encode and protect quantum information. We are interested in questions like: Can quantum information persist on macroscopic timescales? Can we build circuits with more exotic electronic interactions than Cooper pairing?

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Theoretical Quantum Information

We study a new paradigm for encoding, protecting, and manipulating quantum information in a quantum harmonic oscillator (e.g. a high-Q mode of a 3D superconducting cavity) instead of a multi-qubit register. The infinite dimensional Hilbert space of such a system can be used to redundantly encode quantum information.

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Mathematical Theory of Quantum Systems

We develop systematic mathematical methods for dynamical analysis, control, and estimation of composite and open quantum systems. Our subjects of interest range from quantum input-output theory to stabilization by measurement-based quantum feedback.