137 citations · 547 across the 14 of their papers we have counts for
14 papers
Evidence for a low-gap component in compressively stressed niobium thin films
J. T. Paustian, Maciej Olszewski, Kiichi Okubo +6
We investigate the microwave response of sputtered Nb films as a function of biaxial film stress. Although transport measurements show nearly identical superconducting transition t…
Quasiparticle-induced transitions in a fluxonium qubit
Maksim Litskevich, Kesavan Manivannan, Benjamin Byrd +4
Quasiparticles are a prominent decoherence source in superconducting qubits, but their effects are notoriously difficult to isolate in fluxonium. Unlike the transmon, fluxonium is…
Low-loss Nb on Si superconducting resonators from a dual-use spintronics deposition chamber and with acid-free post-processing
Maciej W. Olszewski, Jadrien T. Paustian, Tathagata Banerjee +13
Magnetic impurities are known to degrade superconductivity. For this reason, physical vapor deposition chambers that have previously been used for magnetic materials have generally…
Modeling phonon-mediated quasiparticle poisoning in superconducting qubit arrays
Eric Yelton, Clayton P. Larson, Vito Iaia +8
Correlated errors caused by ionizing radiation impacting superconducting qubit chips are problematic for quantum error correction. Such impacts generate quasiparticle (QP) excitati…
Measurement-induced state transitions in dispersive qubit readout schemes
Konstantin N. Nesterov, Ivan V. Pechenezhskiy
The dispersive-readout scheme enables quantum nondemolition measurement of superconducting qubits. An increased readout power can shorten the readout time and reduce the state disc…
Counting statistics of microwave photons in circuit QED
Konstantin N. Nesterov, Ivan V. Pechenezhskiy, Maxim G. Vavilov
In superconducting circuit architectures for quantum computing, microwave resonators are often used both to isolate qubits from the electromagnetic environment and to facilitate qu…
The superconducting quasicharge qubit
Ivan V. Pechenezhskiy, Raymond A. Mencia, Long B. Nguyen +2
The non-dissipative non-linearity of a Josephson junction converts macroscopic superconducting circuits into artificial atoms, enabling some of the best controlled quantum bits (qu…
Digital coherent control of a superconducting qubit
Edward Leonard, Matthew A. Beck, JJ Nelson +15
High-fidelity gate operations are essential to the realization of a fault-tolerant quantum computer. In addition, the physical resources required to implement gates must scale effi…
Measurement of a Superconducting Qubit with a Microwave Photon Counter
A. Opremcak, I. V. Pechenezhskiy, C. Howington +12
Fast, high-fidelity measurement is a key ingredient for quantum error correction. Conventional approaches to the measurement of superconducting qubits, involving linear amplificati…
Microwave-Activated Controlled-Z Gate for Fixed-Frequency Fluxonium Qubits
Konstantin N. Nesterov, Ivan V. Pechenezhskiy, Chen Wang +2
The superconducting fluxonium circuit is an artificial atom with a strongly anharmonic spectrum: when biased at a half flux quantum, the lowest qubit transition is an order of magn…
Imaging structural transitions in organometallic molecules on Ag(100) for solar thermal energy storage
Jongweon Cho, Ivan V. Pechenezhskiy, Luis Berbil-Bautista +3
The use of opto-thermal molecular energy storage at the nanoscale creates new opportunities for powering future microdevices with flexible synthetic tailorability. Practical applic…
Phonon-Mediated Quasiparticle Poisoning of Superconducting Microwave Resonators
U. Patel, Ivan V. Pechenezhskiy, B. L. T. Plourde +2
Nonequilibrium quasiparticles represent a significant source of decoherence in superconducting quantum circuits. Here we investigate the mechanism of quasiparticle poisoning in dev…
Intermolecular interactions and substrate effects for an adamantane monolayer on the Au(111) surface
Yuki Sakai, Giang D. Nguyen, Rodrigo B. Capaz +8
We study theoretically and experimentally the infrared (IR) spectrum of an adamantane monolayer on a Au(111) surface. Using a new STM-based IR spectroscopy technique (IRSTM) we are…
Photo-current and photo-voltage oscillations in the two-dimensional electron system: screening and "anti-screening" of a potential profile
S. I. Dorozhkin, I. V. Pechenezhskiy, L. N. Pfeiffer +4
We observe in state-of-the-art GaAs based 2D electron systems microwave induced photo-current and photo-voltage oscillations around zero as a function of the applied magnetic field…