A Superconducting Qubit Measurement, Control, and Feedback System
Abstract
Superconducting qubits are one of the most promising quantum information technologies today. They combine compact size with long-lived coherence, strong addressability, and easy coupling, allowing for the possibility of scaling to large quantum processors. Control and measurement of these qubits requires sending precisely-shaped pulses of microwave frequency (~1-20 GHz) tones into a dilution refrigerator at low temperature, routing the pulses to the appropriate port, amplifying resultant signals with minimal noise, and digitizing the result at room temperature. State-of-the art feedback techniques require qubit manipulation pulses to be rapidly generated based on measurement results, with latency times less than ~ 1 s. Generating these pulses, routing them, amplifying them, and reading out the result are challenging tasks requiring specialized equipment. Furthermore, equipment costs per qubit can be prohibitive. Care must be taken to ensure that measurement and control systems can be economically scaled to handle large numbers of qubits.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110132
Entities
People
- Eli Levenson-Falk
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Southern California