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Quantum Processing Group

The Quantum Processing Group develops new technologies for processing information using superconducting circuits. In addition, advanced fabrication techniques are being developed to enable true scaling of both superconducting quantum computers and ion-trap based systems.

Projects and Programs

Ion Traps

The Ion Traps Project collaborates with PML's Ion Storage Group to lower the intrinsic heating of ions from ion trap components.

Qubits

The Qubits Project develops new geometries for superconducting quantum binary devices as fundamental building blocks for quantum computing.

Amplifiers

To process quantum information it is important to have amplifiers with wide bandwidth, high dynamic range, and low noise.

Publications

Materials loss measurements using superconducting microwave resonators

Author(s)
Corey Rae H. McRae, Haozhi Wang, Jiansong Gao, Michael R. Vissers, Teresa Brecht, A Dunsworth, David P. Pappas, J. Mutus
The performance of superconducting circuits for quantum computing is limited by materials losses. In particular, coherence times are typically bounded by two

Overlap junctions for superconducting quantum electronics and amplifiers

Author(s)
Mustafa Bal, Junling Long, Ruichen Zhao, Haozhi Wang, Sungoh Park, Corey Rae H. McRae, Tongyu Zhao, Russell Lake, Daniil Frolov, Roman Pilipenko, Silvia Zorzetti, Alexander Romanenko, David P. Pappas
Due to their unique properties as lossless, nonlinear circuit elements, Josephson junctions lie at the heart of superconducting quantum information processing

Amplitude and frequency sensing of microwave fields with a superconducting transmon qudit

Author(s)
Maximilian Kristen, Andre Schneider, Alexander Stehli, Tim Wolz, Sergey Danilin, Hsiang S. Ku, Junling Long, Xian Wu, Russell Lake, David P. Pappas, Alexey V. Ustinov, Martin Weides
Experiments with superconducting circuits require careful calibration of the applied pulses and fields over a large frequency range. This remains an ongoing

Dielectric loss extraction for superconducting microwave resonators

Author(s)
Corey Rae H. McRae, Russell Lake, Junling Long, Mustafa Bal, Xian Wu, Battogtokh Jugdersuren, Thomas Metcalf, Xiao Liu, David P. Pappas
The investigation of two-level-state (TLS) loss in dielectric materials and interfaces remains at the forefront of materials research in superconducting quantum

Awards

2014 APS Fellow - David Pappas

The criterion for election is exceptional contributions to the physics enterprise; e.g., outstanding physics research, important...

NRC Postodcoral Opportunity

Contacts

Group Leader

Project Leaders