K. Anyang
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View article: Measurement of correlated charge noise in superconducting qubits at an underground facility
Measurement of correlated charge noise in superconducting qubits at an underground facility Open
The charge environment of superconducting qubits may be studied through the introduction of controlled, quantified amounts of ionizing radiation. We measure space- and time-correlated charge jumps on a four-qubit device, operating 107 mete…
View article: Cryogenic optical beam steering for superconducting device calibration
Cryogenic optical beam steering for superconducting device calibration Open
We have developed a calibration system based on a micro-electromechanical systems (MEMS) mirror that is capable of delivering an optical beam over a wavelength range of 180 -- 2000 nm (0.62 -- 6.89 eV) in a sub-Kelvin environment. This por…
View article: Estimating the energy threshold of phonon-mediated superconducting qubit detectors operated in an energy-relaxation sensing scheme
Estimating the energy threshold of phonon-mediated superconducting qubit detectors operated in an energy-relaxation sensing scheme Open
In recent years, the lack of a conclusive detection of WIMP dark matter at the 10 GeV/c$^{2}$ mass scale and above has encouraged development of low-threshold detector technology aimed at probing lighter dark matter candidates. Detectors b…
View article: Simulating Superconducting Devices in Novel Materials Using the G4CMP Simulation Toolkit
Simulating Superconducting Devices in Novel Materials Using the G4CMP Simulation Toolkit Open
Understanding the kinematics of phonons and charge propagation in superconducting devices is crucial for conducting low-threshold dark matter searches and minimizing correlated errors in superconducting qubits. For nearly a decade, the Gea…
View article: Modeling Athermal Phonons in Novel Materials using the G4CMP Simulation Toolkit
Modeling Athermal Phonons in Novel Materials using the G4CMP Simulation Toolkit Open
Understanding phonon and charge propagation in superconducting devices plays an important role in both performing low-threshold dark matter searches and limiting correlated errors in superconducting qubits. The Geant4 Condensed Matter Phys…
View article: First Measurement of Correlated Charge Noise in Superconducting Qubits at an Underground Facility
First Measurement of Correlated Charge Noise in Superconducting Qubits at an Underground Facility Open
We measure space- and time-correlated charge jumps on a four-qubit device, operating 107 meters below the Earth's surface in a low-radiation, cryogenic facility designed for the characterization of low-threshold particle detectors. The roc…
View article: Sapphire substrate qubit-based detector for light dark matter search
Sapphire substrate qubit-based detector for light dark matter search Open
Harnessing sub-eV energy excitations from light dark matter interaction with a target material is one of the challenges in exploring promising novel materials for dark matter searches. In polar materials like sapphire, dark matter interact…