Microwave Instrumentation for Cryogenic, Quantum-limited Measurement and Feedback
Abstract
This program requests funds for the assembly of microwave control and readout electronics for superconducting quantum circuits, including qubits, cavities, and amplifiers. The instrument consists of heavily filtered cryogenic microwave input lines, filtered very low noise output lines, and room temperature electronics centered on a PXI chassis containing integrated arbitrary waveform generators and digitizers. These electronics are synchronized and have onboard FPGAs which be configured to exchange information and respond to inputs with a ~500 ns latency, enabling real time feedback on the quantum systems being studied. This instrumentation will advance superconducting quantum information research at the University of Pittsburgh. Projects of specific interest to the DOD/ARO include (1) improving the fidelity and speed of qubit readout via development of directional, broadband quantum-limited amplifiers via multiply parametric drives (2) studying the use of two-mode squeezed light as an alternative to coherent states in quantum measurement (3) developing a chemical potential for microwave photons and (4) development of a parametrically-driven, quantum signal router for flying microwave photons. This instrumentation will be integrated into existing dilution refrigerator cryostats in the PIÕs laboratory. Over the 15 year useful lifetime of this instrument it will be used in the training and research of several dozens of students and as a resource for collaborations in quantum information, nanoscience and materials science between Pittsburgh-area universities (Carnegie Mellon and Duquesne) and it will support national and international collaborations in quantum device engineering.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 09, 2020
- Source ID
- W911NF2010181
Entities
People
- Michael Hatridge
Organizations
- Army Contracting Command
- United States Army
- University of Pittsburgh