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Search Publications by: Adam Sirois (Fed)

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Displaying 1 - 25 of 36

Characterizing a Frequency Converter Based on a Superconducting Coplanar Waveguide

July 30, 2024
Author(s)
Grant Giesbrecht, Nathan Flowers-Jacobs, Adam Sirois, Manuel Castellanos Beltran, Michael Vissers, JIANSONG GAO, Paul Dresselhaus, Taylor Barton
We present a technique for implementing a frequency doubler in NbTiN on silicon for operation in a cryogenic environment. The kinetic inductance of a superconducting coplanar waveguide is exploited for efficient frequency conversion, while the fabrication

Nb/a-Si/Nb-junction Josephson-based arbitrary waveform synthesizers for quantum information

February 24, 2023
Author(s)
David Olaya, John Biesecker, Manuel Castellanos Beltran, Adam Sirois, Paul Dresselhaus, Samuel P. Benz, Pete Hopkins, Logan Howe
We demonstrate Josephson arbitrary waveform synthesizers (JAWS) with increased operating temperature range for temperatures below 4 K. These JAWS synthesizers were fabricated with externally-shunted Nb/a-Si/Nb junctions whose critical current exhibits

Measurement Challenges for Scaling Superconductor-based Quantum Computers

June 23, 2022
Author(s)
Pete Hopkins, Manuel Castellanos Beltran, John Biesecker, Paul Dresselhaus, Anna Fox, Logan Howe, David Olaya, Adam Sirois, Dylan Williams, Samuel P. Benz, Alirio De Jesus Soares Boaventura, Justus Brevik
Global investment in the research and development of quantum information systems by industry, government, and academic institutions continues to accelerate and is expected to reach over $16B by 2027 [1]. Systems based on optical photons, atoms or ions

Digital Control of Superconducting Qubit Using a Josephson Pulse Generator at 3K

March 25, 2022
Author(s)
Logan Howe, Manuel Castellanos Beltran, Adam Sirois, David Olaya, John Biesecker, Paul Dresselhaus, Samuel P. Benz, Pete Hopkins
Scaling of quantum computers to fault-tolerant levels relies critically on the integration of energy-efficient, stable, and reproducible qubit control and readout electronics. In comparison to traditional semiconductor-control electronics (TSCE) located at

Single-Flux-Quantum Multiplier Circuits for Synthesizing Gigahertz Waveforms With Quantum-Based Accuracy

February 3, 2021
Author(s)
Manuel C. Castellanos Beltran, David I. Olaya, Adam J. Sirois, Christine A. Donnelly, Paul Dresselhaus, Samuel Benz, Peter F. Hopkins
We designed, simulated, and experimentally demonstrated components for a microwave frequency digital-to-analog converter (DAC) based on rapid single flux quantum (RSFQ) circuits and a superconducting amplifier based on SQUID stacks. These are key

Josephson Microwave Sources Applied to Quantum Information Systems

December 18, 2020
Author(s)
Adam J. Sirois, Manuel C. Castellanos Beltran, Anna E. Fox, Samuel P. Benz, Peter F. Hopkins
Quantum computers with thousands or millions of qubits will require a scalable solution for qubit control and readout electronics. Colocating these electronics at millikelvin temperatures has been proposed and demonstrated, but there exist significant

Stacked Josephson Junctions as inductors for SFQ circuits

February 11, 2019
Author(s)
Manuel C. Castellanos Beltran, David I. Olaya, Adam J. Sirois, Paul D. Dresselhaus, Samuel P. Benz, Peter F. Hopkins
In order for Single Flux Quantum (SFQ) circuits to be scaled to densities needed for large-scale integration, typical lithographically-patterned circuit components should be made to be as compact as possible. In this work, we characterize the performance

Scalable, High-Speed, Digital Single-Flux-Quantum Circuits at NIST

June 11, 2017
Author(s)
Pete Hopkins, Manuel Castellanos Beltran, Christine A. Donnelly, Paul Dresselhaus, David Olaya, Adam Sirois, Samuel P. Benz
We describe NIST's capabilities for designing and fabricating niobium-based single-flux quantum (SFQ) digital and mixed-signal circuits and show test results of our first circuits. We have assembled a package of software design tools that are readily

Tunable Resonant and Nonresonant Interactions between a Phase Qubit and LC Resonator

March 26, 2014
Author(s)
Michael S. Allman, Jed D. Whittaker, Manuel C. Castellanos Beltran, Katarina Cicak, Fabio C. Da Silva, Michael DeFeo, Florent Q. Lecocq, Adam J. Sirois, John D. Teufel, Jose A. Aumentado, Raymond W. Simmonds
We use a flux-biased radio frequency superconducting quantum interference device (rf SQUID) with an embedded flux-biased direct current SQUID to generate strong resonant and nonresonant tunable interactions between a phase qubit and a lumped-element

Sideband cooling of micromechanical motion to the quantum ground state

July 6, 2011
Author(s)
John Teufel, Tobias Donner, Dale Li, Michael S. Allman, Katarina Cicak, Adam Sirois, Jed D. Whittaker, Konrad Lehnert, Raymond Simmonds
The advent of laser cooling techniques revolutionized the study of many atomic-scale systems, fuelling progress towards quantum computing with trapped ions and generating new states of matter with Bose–Einstein condensates. Analogous cooling techniques can

Introduction of a DC Bias into a High-Q Superconducting Microwave Cavity

March 31, 2011
Author(s)
Rimberg J. Alex, Fei Chen, Adam J. Sirois, Raymond Simmonds
We report a technique for applying a dc voltage or current bias to the center conductor of a high-quality factor superconducting microwave cavity without significantly disturbing selected cavity modes. This is accomplished by incorporating dc bias lines