Quantum Gates

Tunable coupler enabling two-qubit gates approaching 99.9% fidelity

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 Hollywood Squares

High-connectivity in the age of online group meetings

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 Systems

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

Recent Publications:

Deep neural network discrimination of multiplexed superconducting qubit states
B. Lienhard, A. Vepsäläinen, L. C. G. Govia, C. R. Hoffer, J. Y. Qiu, D. Ristè, M. Ware, D. Kim, R. Winik, A. Melville, B. Niedzielski, J. Yoder, G. J. Ribeill, T. A. Ohki, H. K. Krovi, T. P. Orlando, S. Gustavsson, W. D. Oliver
Phys. Rev. Applied 17, 014024 (2022) | arXiv:2102.12481 (2021)

Twist: sound reasoning for purity and entanglement in Quantum programs
C. Yuan, C. McNally, M. Carbin
Proc. ACM Program. Lang. 6, POPL, Article 30, 1-32 (2022)

Demonstration of Density Matrix Exponentiation using a superconducting quantum processor
M. Kjaergaard, M. E. Schwartz, A. Greene, G. O. Samach, A. Bengtsson, M. O’Keeffe, C. M. McNally, J. Braumüller, D. K. Kim, P. Krantz, M. Marvian, A. Melville, B. M. Niedzielski, Y. Sung, R. Winik, J. L. Yoder, D. Rosenberg, K. Obenland, S. Lloyd, T. P. Orlando, I. Marvian, S. Gustavsson, W. D. Oliver
Phys. Rev. X 12, 011005 (2022) arXiv:2001.08838 (2020)

Probing quantum information propagation with out-of-time-ordered correlators
J. Braumüller, A. H. Karamlou, Y. Yanay, B. Kannan, D. Kim, M. Kjaergaard, A. Melville, B. M. Niedzielski, Y. Sung, A. Vepsäläinen, R. Winik, J. L. Yoder, T. P. Orlando, S. Gustavsson, C. Tahan, W. D. Oliver
Nat. Phys. (2021) | arXiv:2102.11751 (2021)
See also: News and Views by Arghavan SafaviNaini

Quantum computing for business leaders
J. Ruane, A. McAfee, W. D. Oliver
Harvard Business Review, January-February (2022)