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2008•Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physicsRequires access

A way to a single frequency precession of an inhomogeneous ensemble of electron spins in InGaAs quantum dots

A. Greilich, S. Spatzek, Al. L. Éfros, I. A. Yugova, D. R. Yakovlev, D. Reuter, Andreas D. Wieck, M. Bayer

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Abstract

Abstract We show a possible way to the realization of a robust macroscopical quantum bit on the basis of an inhomogeneous ensemble of electron spins. In our case, electrons are confined in a self‐assembled (In,Ga)As/GaAs quantum dots which are excited by a periodical laser pulses. The precession of electron spins in a transversemagnetic field is monitored by the time‐resolved Faraday rotation technique. Due to mode‐locking effect and a focusing of the electron spins precession on a discrete number of modes by the nuclei it should be possible to drive all the electron spins into a single precession mode. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Abstract We show a possible way to the realization of a robust macroscopical quantum bit on the basis of an inhomogeneous ensemble of electron spins. In our case, electrons are confined in a self‐assembled (In,Ga)As/GaAs quantum dots which are excited by a periodical laser pulses. The precession of electron spins in a transversemagnetic field is monitored by the time‐resolved Faraday rotation technique. Due to mode‐locking effect and a focusing of the electron spins precession on a discrete number of modes by the nuclei it should be possible to drive all the electron spins into a single precession mode. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Available abstract

Abstract We show a possible way to the realization of a robust macroscopical quantum bit on the basis of an inhomogeneous ensemble of electron spins. In our case, electrons are confined in a self‐assembled (In,Ga)As/GaAs quantum dots which are excited by a periodical laser pulses. The precession of electron spins in a transversemagnetic field is monitored by the time‐resolved Faraday rotation technique. Due to mode‐locking effect and a focusing of the electron spins precession on a discrete number of modes by the nuclei it should be possible to drive all the electron spins into a single precession mode. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Key concepts: Spins, Precession, Physics, Electron, Condensed matter physics, Faraday effect, Realization (probability), Larmor precession

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