International Business Machines Corporation

University of Colorado

Government of the United States of America, as Represented by the Secretary of Commerce

National Institute of Standards and Technology

Jiansong Gao

Mary Beth Rothwell

Matthias Steffen

George Andrew Keefe

Antonio D Corcoles Gonzalez

Chang Chyi Tsuei

David P Pappas

David S Wisbey

Maxime Bernard Jacques Malnou

Michael R Vissers

Michael Robert Vissers

Dustin A Hite

Jordan Wheeler

Technology is disclosed herein that the enhances the measurability of on-chip temperature in a cryogenic quantum computing environment. In an implementation, transceiver circuitry sends a probe signal through a target device. A lumped-element resonator device that is proximate to the surface of the target device interacts with the probe signal and modulates the probe signal. Processing circuitry reads the probe signal through the target device, and responsively measures the resonance frequency of the lumped-element resonator device. The processing circuitry correlates the measured resonance frequency with a temperature and responsively determines the temperature of the target device.

Cryogenic thermometer based on a two-level systems (TLS)

Low-loss superconducting devices and methods for fabricating low loss superconducting devices. For example, superconducting devices, such as superconducting resonator devices, are formed with a (200)-oriented texture titanium nitride (TiN) layer to provide high Q, low loss resonator structures particularly suitable for application to radio-frequency (RF) and/or microwave superconducting resonators, such as coplanar waveguide superconducting resonators. In one aspect, a method of forming a superconducting device includes forming a silicon nitride (SiN) seed layer on a substrate, and forming a (200)-oriented texture titanium nitride (TiN) layer on the SiN seed layer.

Low-loss superconducting devices

Growing community of inventors

Boulder, CO, United States of America

Jiansong Gao