%0 Journal Article
%T Frequency Multiplexing for Readout of Spin Qubits
%A J. M. Hornibrook
%A J. I. Colless
%A A. C. Mahoney
%A X. G. Croot
%A S. Blanvillain
%A H. Lu
%A A. C. Gossard
%A D. J. Reilly
%J Physics
%D 2013
%I arXiv
%R 10.1063/1.4868107
%X 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.
%U http://arxiv.org/abs/1312.5064v1