Frequency Multiplexing for Readout of Spin Qubits
Authors:
- X. G. CrootXCX. G. Croot
- D. J. ReillyDRD. J. Reilly
Preprint
Abstract
We demonstrate a low loss, chip-level frequency multiplexing scheme for readout of scaled-up spin qubit devices. By integrating separate bias tees and resonator circuits on-chip for each readout channel, we realize dispersive gate-sensing in combination with charge detection based on two rf quantum point contacts (rf-QPCs). We apply this approach to perform multiplexed readout of a double quantum dot in the few-electron regime, and further demonstrate operation of a 10-channel multiplexing device. Limitations for scaling spin qubit readout to large numbers of multiplexed channels is discussed.Keywords
All Related Versions
- Version 1, 2013-12-18, ArXiv
- Published version: Applied Physics Letters, 104 (10), 103108.
This publication has 3 references indexed in Scilit:
- Dispersive Readout of a Few-Electron Double Quantum Dot with Fast rf Gate SensorsPhysical Review Letters, 2013
- Multiplexed dispersive readout of superconducting phase qubitsApplied Physics Letters, 2012
- Publisher's Note: Spins in few-electron quantum dots [Rev. Mod. Phys. 79, 1217 (2007)]Reviews of Modern Physics, 2007