General purpose multiplexing device for cryogenic microwave systems
Abstract
We introduce and experimentally characterize a general purpose device for signal processing in circuit quantum electrodynamics systems. The device is a broadband two-port microwave circuit element with three modes of operation: it can transmit, reflect, or invert incident signals between 4 and 8 GHz. This property makes it a versatile tool for lossless signal processing at cryogenic temperatures. In particular, rapid switching (≤15 ns) between these operation modes enables several multiplexing readout protocols for superconducting qubits. We report the device's performance in a two-channel code domain multiplexing demonstration. The multiplexed data are recovered with fast readout times (up to 400 ns) and infidelities ≤10−2 for probe powers ≥7 fW, in agreement with the expectation for binary signaling with Gaussian noise.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 30, 2016
- Source ID
- 10.1063/1.4952772
Entities
People
- Benjamin J. Chapman
- Bradley A. Moores
- Eric I. Rosenthal
- Joseph Kerckhoff
- Konrad W. Lehnert
Organizations
- Army Research Office
- National Science Foundation
- University of Colorado