Quantum Optics

Engineering quantum interference to protect giant artificial atoms coupled to open waveguides

Quantum Engineering

24-pin package routing input/output signals that control a quantum processor

Quantum-Limited Amplifiers

Near-quantum-limited traveling wave parametric amplifiers (TWPAs)

Quantum Workforce

Vibrant team of post docs, graduate students, and undergraduate researchers

Quantum Systems

Engineering physics in the pursuit of coherent quantum systems and extensible technologies

Quantum Circuits

Integrated quantum circuits fabricated on 200 mm silicon wafers

Quantum Control

Controlling quantum systems with microwave pulses

Quantum Interference

Landau-Zener-Stueckelberg quantum interference realized with superconducting qubits.

Quantum Hollywood Squares

High-connectivity in the age of online group meetings

Quantum Gates

Tunable coupler enabling two-qubit gates approaching 99.9% fidelity


We are a diverse team of physicists and engineers working together to understand, design, manufacture, and control coherent quantum systems comprising superconducting artificial atoms (qubits) for quantum information science and technology applications. Our efforts span fundamental research to applied physics and systems engineering.

Recent Publications:

Quantum transport and localization in 1d and 2d tight-binding lattices
A. H. Karamlou, J. Braumüller, Y. Yanay, A. Di Paolo, P. Harrington, B. Kannan, D, Kim, M. Kjaergaard, A. Melville, S. Muschinske, B. Niedzielski, A. Vepsäläinen, R. Winik, J. L. Yoder, M. Schwartz, C. Tahan, T. P. Orlando, S. Gustavsson, W, D. Oliver
arXiv:2107.05035 (2021)

Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable coupler
Y. Sung, L. Ding, J. Braumüller, A. Vepsäläinen, B. Kannan, M. Kjaergaard, A. Greene, G. O. Samach, C. McNally, D. Kim, A. Melville, B. M. Niedzielski, M. E. Schwartz, J. L. Yoder, T. P. Orlando, S. Gustavsson, W. D. Oliver
Phys. Rev. X 11, 021058 (2021) | arXiv:2011.01261 (2020)

CircuitQ: An open-source toolbox for superconducting circuits
P. Aumann, T. Menke, W. D. Oliver, W. Lechner
arXiv:2106.05342 (2021)

Lindblad Tomography of a Superconducting Quantum Processor
G. O. Samach, A. Greene, J. Borregaard, M. Christandl, D. K. Kim, C. M. McNally, A. Melville, B. M. Niedzielski, Y. Sung, D. Rosenberg, M. E. Schwartz, J. L. Yoder, T. P. Orlando, J. I-J. Wang, S. Gustavsson, M. Kjaergaard, W. D. Oliver
arXiv:2105.02338 (2021)

Improving qubit coherence using closed-loop feedback
A. Vepsäläinen, R. Winik, A. H. Karamlou, J. Braumüller, A. Di Paolo, Y. Sung, B. Kannan, M. Kjaergaard, D. K. Kim, A. J. Melville, B. M. Niedzielski, J. L. Yoder, S. Gustavsson, W. D. Oliver
arXiv:2105.01107 (2021)