Charge and spin state readout of a double quantum dot coupled to a resonator

K D Petersson; C G Smith; D Anderson; P Atkinson; G A C Jones; D A Ritchie

doi:10.1021/nl100663w

Charge and spin state readout of a double quantum dot coupled to a resonator

Nano Lett. 2010 Aug 11;10(8):2789-93. doi: 10.1021/nl100663w.

Authors

K D Petersson¹, C G Smith, D Anderson, P Atkinson, G A C Jones, D A Ritchie

Affiliation

¹ Cavendish Laboratory, JJ Thomson Road, Cambridge CB3 0HE, United Kingdom. kpeterss@princeton.edu

PMID: 20698590
DOI: 10.1021/nl100663w

Abstract

State readout is a key requirement for a quantum computer. For semiconductor-based qubit devices it is usually accomplished using a separate mesoscopic electrometer. Here we demonstrate a simple detection scheme in which a radio frequency resonant circuit coupled to a semiconductor double quantum dot is used to probe its charge and spin states. These results demonstrate a new noninvasive technique for measuring charge and spin states in quantum dot systems without requiring a separate mesoscopic detector.