412 citations · 1.6k across the 15 of their papers we have counts for
16 papers
Improving Transmon Qubit Performance with Fluorine-based Surface Treatments
Michael A. Gingras, Bethany M. Niedzielski, Kevin A. Grossklaus +21
Reducing materials and processing-induced decoherence is critical to the development of utility-scale quantum processors based on superconducting qubits. Here we report on the impa…
Broadband Squeezed Microwaves and Amplification with a Josephson Traveling-Wave Parametric Amplifier
Jack Y. Qiu, Arne Grimsmo, Kaidong Peng +16
Squeezing of the electromagnetic vacuum is an essential metrological technique used to reduce quantum noise in applications spanning gravitational wave detection, biological micros…
Dark Matter Axion Search Using a Josephson Traveling Wave Parametric Amplifier
C. Bartram, T. Braine, R. Cervantes +48
We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above over the frequency range 4796.7--4799.…
Fabrication of superconducting through-silicon vias
Justin L. Mallek, Donna-Ruth W. Yost, Danna Rosenberg +15
Increasing circuit complexity within quantum systems based on superconducting qubits necessitates high connectivity while retaining qubit coherence. Classical micro-electronic syst…
Microwave Package Design for Superconducting Quantum Processors
Sihao Huang, Benjamin Lienhard, Greg Calusine +10
Solid-state qubits with transition frequencies in the microwave regime, such as superconducting qubits, are at the forefront of quantum information processing. However, high-fideli…
Comparison of Dielectric Loss in Titanium Nitride and Aluminum Superconducting Resonators
Alexander Melville, Greg Calusine, Wayne Woods +8
Lossy dielectrics are a significant source of decoherence in superconducting quantum circuits. In this report, we model and compare the dielectric loss in bulk and interfacial diel…
Solid-state qubits integrated with superconducting through-silicon vias
Donna-Ruth W. Yost, Mollie E. Schwartz, Justin Mallek +14
As superconducting qubit circuits become more complex, addressing a large array of qubits becomes a challenging engineering problem. Dense arrays of qubits benefit from, and may re…
Silicon Hard-Stop Spacers for 3D Integration of Superconducting Qubits
Bethany M. Niedzielski, David K. Kim, Mollie E. Schwartz +9
As designs for superconducting qubits become more complex, 3D integration of two or more vertically bonded chips will become necessary to enable increased density and connectivity.…
3D integration and packaging for solid-state qubits
D. Rosenberg, S. Weber, D. Conway +9
Developing a packaging scheme that meets all of the requirements for operation of solid-state qubits in a cryogenic environment can be a formidable challenge. In this article, we d…
Microwave Packaging for Superconducting Qubits
Benjamin Lienhard, Jochen Braumüller, Wayne Woods +8
Over the past two decades, the performance of superconducting quantum circuits has tremendously improved. The progress of superconducting qubits enabled a new industry branch to em…
Determining interface dielectric losses in superconducting coplanar waveguide resonators
Wayne Woods, Greg Calusine, Alexander Melville +6
Superconducting quantum computing architectures comprise resonators and qubits that experience energy loss due to two-level systems (TLS) in bulk and interfacial dielectrics. Under…
Analysis and mitigation of interface losses in trenched superconducting coplanar waveguide resonators
Greg Calusine, Alexander Melville, Wayne Woods +12
Improving the performance of superconducting qubits and resonators generally results from a combination of materials and fabrication process improvements and design modifications t…
Cavity-enhanced measurements of defect spins in silicon carbide
Greg Calusine, Alberto Politi, David D. Awschalom
The identification of new solid-state defect qubit candidates in widely used semiconductors has the potential to enable the use of nanofabricated devices for enhanced qubit measure…
Silicon Carbide Photonic Crystal Cavities with Integrated Color Centers
Greg Calusine, Alberto Politi, David D. Awschalom
The recent discovery of color centers with optically addressable spin states in 3C silicon carbide (SiC) similar to the negatively charged nitrogen vacancy center in diamond has th…
Electrically and mechanically tunable electron spins in silicon carbide color centers
Abram L. Falk, Paul V. Klimov, Bob B. Buckley +6
The electron spins of semiconductor defects can have complex interactions with their host, particularly in polar materials like SiC where electrical and mechanical variables are in…
Polytype control of spin qubits in silicon carbide
Abram L. Falk, Bob B. Buckley, Greg Calusine +6
Crystal defects can confine isolated electronic spins and are promising candidates for solid-state quantum information. Alongside research focusing on nitrogen vacancy centers in d…