120 citations · 542 across the 19 of their papers we have counts for
19 papers
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…
Making soft solids flow: microscopic bursts and conga lines in jammed emulsions
Vishwas V. Vasisht, S. K. Dutta, Emanuela Del Gado +1
It is well known that jammed soft materials will flow if sheared above their yield stress - think mayonnaise spread on bread - but a complete microscopic description of this seemin…
Multi-level Spectroscopy of Two-Level Systems Coupled to a dc SQUID Phase Qubit
T. A. Palomaki, S. K. Dutta, R. M. Lewis +8
We report spectroscopic measurements of discrete two-level systems (TLSs) coupled to a dc SQUID phase qubit with a 16 μ\m2 area Al/AlOx/Al junction. Applying microwaves in the 10 G…
Multilevel effects in the Rabi oscillations of a Josephson phase qubit
S. K. Dutta, Frederick W. Strauch, R. M. Lewis +8
We present Rabi oscillation measurements of a Nb/AlOx/Nb dc superconducting quantum interference device (SQUID) phase qubit with a 100 um^2 area junction acquired over a range of m…
Decoherence in dc SQUID phase qubits
Hanhee Paik, S. K. Dutta, R. M. Lewis +8
We report measurements of Rabi oscillations and spectroscopic coherence times in an Al/AlOx/Al and three Nb/AlOx/Nb dc SQUID phase qubits. One junction of the SQUID acts as a phase…