Joe Aumentado

Publications

Low-noise cryogenic RF/microwave amplifier characterization with a calibrated noise source

December 22, 2023

Author(s)

Maxime Malnou, Trevyn Larson, John Teufel, Florent Lecocq, Joe Aumentado

Superconducting parametric amplifiers have become a workhorse in superconducting quantum computing, however research and development of these devices has been

Systematic Improvements in Transmon Qubit Coherence enabled by Niobium Surface Encapsulation

June 14, 2023

Author(s)

Mustafa BAL, Akshay Murthy, Francesco Crisa, Shaojiang Zhu, Florent Lecocq, Joe Aumentado, Joel Ullom, Pete Hopkins

We present a novel transmon qubit fabrication technique that yields systematic improvements in T1 coherence times. In this study, the devices are fabricated

Versatile parametric coupling between two statically decoupled transmon qubits

May 4, 2023

Author(s)

Xiaoyue Jin, Zachary Parrott, SHLOMI KOTLER, Katarina Cicak, Florent Lecocq, John Teufel, Joe Aumentado, Raymond Simmonds

Parametric coupling is a powerful technique for generating tunable interactions between superconducting circuits using only microwave tones. Here, we present a

Contactless Excitation of Acoustic Resonance in Thin Wafers

October 4, 2022

Author(s)

Gan Zhai, Yizhou Xin, Cameron Kopas, Ella Lachman, Mark Field, Josh Y Mutus, Katarina Cicak, Joe Aumentado, Zuhawn Sung, William Halperin

Contactless excitation and detection of high harmonic acoustic overtones in a thin single crystal are described using radio frequency spectroscopy techniques

Performance of a Kinetic-Inductance Traveling-Wave Parametric Amplifier at 4 Kelvin: Toward an Alternative to Semiconductor Amplifiers

April 5, 2022

Author(s)

Maxime Malnou, Joe Aumentado, Michael Vissers, Jordan Wheeler, Johannes Hubmayr, Joel Ullom, Jiansong Gao

Most microwave readout architectures in quantum computing or sensing rely on a semiconductor amplifier at 4\,K, typically a high-electron mobility transistor

View more Publications

Patents (2018-Present)

Delivering Signals To Cryogenic Environments Via Photonic Links

NIST Inventors

Franklyn Quinlan , Scott Diddams , Joe Aumentado , Florent Lecocq and John Teufel

An operational environment is disclosed herein that includes a cryogenic environment and a signal source. The cryogenic environment includes a signal target, an optical link, signal converter devices, and an electrical link. Outside of the cryogenic environment, the signal source generates an

View All Patents

Joe Aumentado (Fed)

Publications

Patents (2018-Present)