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

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

2010-04-23

arxiv.org/abs/1004.4047v1

Nano Lett. 10, 2789-2793 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

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 non-invasive technique for measuring charge and spin states in quantum dot systems without requiring a separate mesoscopic detector.

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