Spin Readout and Initialization in a Semiconductor Quantum Dot

Mark Friesen, Charles Tahan, Robert Joynt, and M. A. Eriksson
Phys. Rev. Lett. 92, 037901 – Published 20 January 2004

Abstract

Electron spin qubits in semiconductors are attractive from the viewpoint of long coherence times. However, single spin measurement is challenging. Several promising schemes incorporate ancillary tunnel couplings that may provide unwanted channels for decoherence. Here, we propose a novel spin-charge transduction scheme, converting spin information to orbital information within a single quantum dot by microwave excitation. The same quantum dot can be used for rapid initialization, gating, and readout. We present detailed modeling of such a device in silicon to confirm its feasibility.

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  • Received 17 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.037901

©2004 American Physical Society

Authors & Affiliations

Mark Friesen*, Charles Tahan, Robert Joynt, and M. A. Eriksson

  • Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA

  • *Electronic address: friesen@cae.wisc.edu

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Issue

Vol. 92, Iss. 3 — 23 January 2004

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