538 citations · 2.1k across the 36 of their papers we have counts for
21 papers · 1 filter
Multiple Andreev Reflection Effects in Asymmetric STM Josephson Junctions
Wan-Ting Liao, S. K. Dutta, R. E. Butera +3
We have examined the electrical behavior of Josephson junctions formed by a scanning tunneling microscope (STM) with a Nb sample and a Nb tip, with normal-state resistances Rn vary…
Microwave photon-assisted phase-incoherent Cooper-pair tunneling in a Josephson STM
A. Roychowdhury, M. Dreyer, J. R. Anderson +2
We have observed photon-assisted Cooper-pair tunneling in an atomic-scale Josephson junction formed between a superconducting Nb tip and a superconducting Nb sample in a scanning t…
A Josephson junction defect spectrometer for measuring two-level systems
M. J. A. Stoutimore, M. S. Khalil, C. J. Lobb +1
We have fabricated and measured Josephson junction defect spectrometers (JJDSs), which are frequency-tunable, nearly-harmonic oscillators that probe strongly-coupled two-level syst…
Superposition of Inductive and Capacitive Coupling in Superconducting LC Resonators
Sergiy Gladchenko, Moe Khalil, C. J. Lobb +2
We present an experimental investigation of lumped-element superconducting LC resonators designed to provide different types of coupling to a transmission line. We have designed fo…
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…