4 citations · 11 across the 6 of their papers we have counts for
6 papers
Programmable CMOS DAC Operating in Cryogenic Environments for Controlling Superconducting Qubits
A. Pelteku, D. Reitz, M. Covington +15
This paper presents the design and test results of a CMOS current-based Digital to Analog Converter (DAC) that operates at cryogenic temperatures and that can be used to precisely…
Charge Parity Rates in Transmon Qubits with Different Shunting Capacitors
Yi-Hsiang Huang, Haozhi Wang, Yizhou Huang +3
The presence of non-equilibrium quasiparticles in superconducting resonators and qubits operating at millikelvin temperature has been known for decades. One metric for the number o…
Generalized geometric speed limits for quantum observables
Jacob Bringewatt, Zach Steffen, Martin A. Ritter +6
Leveraging quantum information geometry, we derive generalized quantum speed limits on the rate of change of the expectation values of observables. These bounds subsume and, for Hi…
Identification and Mitigation of Conducting Package Losses for Quantum Superconducting Devices
Yizhou Huang, Yi-Hsiang Huang, Haozhi Wang +4
Low-loss superconducting rf devices are required when used for quantum computation. Here, we present a series of measurements and simulations showing that conducting losses in the…
Characterization of Asymmetric Gap-Engineered Josephson Junctions and 3D Transmon Qubits
Zach Steffen, S. K. Dutta, Haozhi Wang +6
We have fabricated and characterized asymmetric gap-engineered junctions and transmon devices. To create Josephson junctions with asymmetric gaps, Ti was used to proximitize and lo…
Long-lived transmons with different electrode layouts
Kungang Li, S. K. Dutta, Zachary Steffen +6
To test the contribution of non-equilibrium quasiparticles to qubit relaxation, we have repeatedly measured the relaxation time T_1 in Al/AlOx/Al transmons with electrodes that hav…