Explanipedia

Comparison of Nb and Ta Pentoxide Loss Tangents for Superconducting Quantum Devices Open

William Mah, Peter A.C. Lim, T. Guess, S. B. Majumder, David A. Garcia‐Wetten , et al. · 2025

Superconducting transmon qubits are commonly made with thin-film Nb wiring, but recent studies have shown increased performance with Ta wiring. In this work, we compare the resonator-induced single photon, millikelvin dielectric loss for p…

0241 Dermatology access in distressed communities: Exploring the impact of community economic hardship on care availability Open

Corey Rae McRae, Elizabeth Nichols, Cheryl L. Sisk, Linda Turner, Maia Anderson , et al. · 2025

0352 Medical student perspectives on the role of artificial intelligence in dermatology: Implications for specialty choice and ethical concerns Open

L. Turner, Michael Anderson, Corey Rae McRae, A. Schroeder, Lauren Kole · 2025

0281 The care gap: Workforce and wait time inequities in comprehensive urgent and cosmetic dermatology Open

Corey Rae McRae, Elizabeth Nichols, Cheryl L. Sisk, Michael Anderson, Leigh Turner , et al. · 2025

An Effective Reflection Mode Measurement for Hanger-Coupled Microwave Resonators Open

John R. Pitten, Nicholas Materise, Wei-Ren Syong, Jorge Ramirez, D. A. Bennett , et al. · 2025

Superconducting microwave resonators are used to study two-level system (TLS) loss in superconducting quantum devices. Fano asymmetry, characterized by a nonzero asymmetry angle $ϕ$ in the diameter correction method (DCM), results from the…

Loss tangent fluctuations due to two-level systems in superconducting microwave resonators Open

André Vallières, Megan E. Russell, Xinyuan You, David A. Garcia‐Wetten, Dominic P. Goronzy , et al. · 2025

Superconducting microwave resonators are critical to quantum computing and sensing technologies. Additionally, they are common proxies for superconducting qubits when determining the effects of performance-limiting loss mechanisms such as …

Formation and Microwave Losses of Hydrides in Superconducting Niobium Thin Films Resulting from Fluoride Chemical Processing Open

Carlos G. Torres‐Castanedo, Dominic P. Goronzy, Thang Pham, Anthony McFadden, Nicholas Materise , et al. · 2024

Superconducting niobium (Nb) thin films have recently attracted significant attention due to their utility for quantum information technologies. In the processing of Nb thin films, fluoride‐based chemical etchants are commonly used to remo…

Novel approach to the global analysis of proton form factors in elastic electron-proton scattering Open

Corey Rae McRae, P. G. Blunden · 2024

We present a method for the global analysis of elastic electron-proton scattering when combining data sets from experiments with different overall normalization uncertainties. The method is a modification of one employed by the NNPDF colla…

Grain size in low loss superconducting Ta thin films on c axis sapphire Open

Sarah C. Jones, Nicholas Materise, Casey Ka Wun Leung, Joel C. Weber, Brian D. Isakov , et al. · 2023

In recent years, the implementation of thin-film Ta has led to improved coherence times in superconducting circuits. Efforts to further optimize this materials set have become a focus of the subfield of materials for superconducting quantu…

Grain size in low loss superconducting Ta thin films on c-axis sapphire Open

Sarah C. Jones, Nicholas Materise, Casey Ka Wun Leung, Brian D. Isakov, Xi Chen , et al. · 2023

In recent years, the implementation of thin-film Ta has led to improved coherence times in superconducting circuits. Efforts to further optimize this materials set have become a focus of the subfield of materials for superconducting quantu…

Dataset for "Grain size in low loss superconducting Ta thin films on c-axis sapphire" July 2023 Open

Corey Rae McRae, Nicholas Materise · 2023

Data from S21 measurements of Ta on c-axis sapphire superconducting coplanar waveguide resonators.

Dataset for "Grain size in low loss superconducting Ta thin films on c-axis sapphire" July 2023 Open

Corey Rae McRae, Nicholas Materise · 2023

Data from S21 measurements of Ta on c-axis sapphire superconducting coplanar waveguide resonators.

Disentangling the sources of ionizing radiation in superconducting qubits Open

L. Cardani, I. Colantoni, A. Cruciani, Florence De Dominicis, G. D’imperio , et al. · 2023

Disentangling the sources of ionizing radiation in superconducting qubits Open

L. Cardani, I. Colantoni, A. Cruciani, Francesco De Dominicis, G. D'Imperio , et al. · 2022

Radioactivity was recently discovered as a source of decoherence and correlated errors for the real-world implementation of superconducting quantum processors. In this work, we measure levels of radioactivity present in a typical laborator…

Towards merged-element transmons using silicon fins: The FinMET Open

Aranya Goswami, Anthony McFadden, Tongyu Zhao, Hadass S. Inbar, Jason T. Dong , et al. · 2022

A merged-element transmon (MET) device based on silicon (Si) fins is proposed, and the first steps to form such a “FinMET” are demonstrated. This new application of fin technology capitalizes on the anisotropic etch of Si(111) relative to …

Building a Quantum Engineering Undergraduate Program Open

Abraham Asfaw, Alexandre Blais, Kenneth R. Brown, Jonathan Candelaria, Christopher Cantwell , et al. · 2022

Contribution: A roadmap is provided for building a quantum engineering education program to satisfy U.S. national and international workforce needs. Background: The rapidly growing quantum information science and engineering (QISE)…

Stability, metallicity, and magnetism in niobium silicide nanofilms Open

Xue‐Zeng Lu, Dominic P. Goronzy, Carlos G. Torres‐Castanedo, Paul Masih Das, Maryam Kazemzadeh-Atoufi , et al. · 2022

Modern superconducting qubits based on two-dimensional (2D) transmons typically involve the growth of Nb thin films on high-resistivity Si substrates. Since imperfections at the Nb-Si heterointerface have been implicated as a source of two…

Quantum computing hardware for HEP algorithms and sensing Open

M. Sohaib Alam, S. Belomestnykh, Nicholas Bornman, Gustavo Cancelo, Yu-Chiu Chao , et al. · 2022

Quantum information science harnesses the principles of quantum mechanics to realize computational algorithms with complexities vastly intractable by current computer platforms. Typical applications range from quantum chemistry to optimiza…

Simple coplanar waveguide resonator mask targeting metal-substrate interface Open

Cameron Kopas, Ella Lachman, Corey Rae McRae, Yuvraj Mohan, Josh Mutus , et al. · 2022

This white paper presents a single-layer mask, found at https://github.com/Boulder-Cryogenic-Quantum-Testbed/simple-resonator-mask. It is designed for fabrication of superconducting microwave resonators towards 1:1 comparisons of dielectri…

Building a Quantum Engineering Undergraduate Program Open

Abraham Asfaw, Alexandre Blais, Kenneth R. Brown, Jonathan Candelaria, Christopher Cantwell , et al. · 2022

The rapidly growing quantum information science and engineering (QISE) industry will require both quantum-aware and quantum-proficient engineers at the bachelor's level. We provide a roadmap for building a quantum engineering education pro…

Merged-element transmons on Si fins: the FinMET Open

Aranya Goswami, Anthony McFadden, Hadass S. Inbar, Ruichen Zhao, Corey Rae McRae , et al. · 2021

A merged-element transmon (MET) device, based on Si fins, is proposed and the steps to form such a are demonstrated. This new application of fin technology capitalizes on the anisotropic etch of Si(111) relative to Si(110) to define atomi…

Cryogenic single-port calibration for superconducting microwave resonator measurements Open

H. Wang, Suren Singh, Corey Rae McRae, Joseph C. Bardin, Lin Sx , et al. · 2021

Superconducting circuit testing and materials loss characterization requires robust and reliable methods for the extraction of internal and coupling quality factors of microwave resonators. A common method, imposed by limitations on the de…

A universal quantum gate set for transmon qubits with strong ZZ interactions Open

Junling Long, Tongyu Zhao, Mustafa Bal, Ruichen Zhao, George S. Barron , et al. · 2021

High-fidelity single- and two-qubit gates are essential building blocks for a fault-tolerant quantum computer. While there has been much progress in suppressing single-qubit gate errors in superconducting qubit systems, two-qubit gates sti…

Cryogenic single-port calibration for superconducting microwave resonator measurements Open

H. Wang, Surya Prakash Singh, Corey Rae McRae, Joseph C. Bardin, Siqi Lin , et al. · 2021

Superconducting circuit testing and materials loss characterization requires robust and reliable methods for the extraction of internal and coupling quality factors of microwave resonators. A common method, imposed by limitations on the de…

Epitaxial Al/GaAs/Al tri-layers fabricated using a novel wafer-bonding technique Open

Anthony McFadden, Aranya Goswami, Michael Seas, Corey Rae McRae, Ruichen Zhao , et al. · 2020

Epitaxial Al/GaAs/Al structures having controlled thickness of high-quality GaAs and pristine interfaces have been fabricated using a wafer-bonding technique. III–V semiconductor/Al structures are grown by molecular beam epitaxy on III–V s…

Merged-element transmon Open

Ruichen Zhao, Sungoh Park, Tongyu Zhao, Mustafa Bal, Corey Rae McRae , et al. · 2020

Transmon qubits are ubiquitous in the pursuit of quantum computing using superconducting circuits. However, they have some drawbacks that still need to be addressed. Most importantly, the scalability of transmons is limited by the large de…

Epitaxial Al/GaAs/Al tri-layers fabricated using a novel wafer-bonding\n technique Open

Anthony McFadden, Aranya Goswami, Michael Seas, Corey Rae McRae, Ruichen Zhao , et al. · 2020

Epitaxial Al/GaAs/Al structures having controlled thickness of high-quality\nGaAs and pristine interfaces have been fabricated using a wafer-bonding\ntechnique. III-V semiconductor/Al structures are grown by molecular beam\nepitaxy on III-…

Thin film metrology and microwave loss characterization of indium and aluminum/indium superconducting planar resonators Open

Corey Rae McRae, J. H. Béjanin, C. T. Earnest, Thomas McConkey, J. R. Rinehart , et al. · 2018

Scalable architectures characterized by quantum bits (qubits) with low error rates are essential to the development of a practical quantum computer. In the superconducting quantum computing implementation, understanding and minimizing mate…

Enhanced superconducting transition temperature in electroplated rhenium Open

David P. Pappas, Donald E. David, Russell E. Lake, Mustafa Bal, Ron Goldfarb , et al. · 2018

We show that electroplated Re films in multilayers with noble metals such as Cu, Au, and Pd have an enhanced superconducting critical temperature relative to previous methods of preparing Re. The dc resistance and magnetic susceptibility i…

Indium Thin Films in Multilayer Superconducting Quantum Circuits Open

Corey Rae McRae · 2018

The superconducting quantum computer is an implementation of the quantum computer and a current leader the field in terms of performance and potential for scalability to large systems. Its two main components are the superconducting microw…

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