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Electrical control of the exciton fine structure of a quantum dot molecule
Authors
,
,
+7 more
,
AJ Bennett
A Boyer De La Giroday
I Farrer
DA Ritchie
AJ Shields
N Sköld
Publication date
2 January 2013
Publisher
Abstract
We electrically control the coherent mixing of the optically bright spin states of excitons confined in InAs/GaAs quantum dot molecules. By tunnel coupling two quantum dots, using a vertical electric field, the exciton fine structure splitting and eigenstate orientation relative to the crystal lattice are tuned. We model the electric field dependent anisotropic electron-hole exchange interaction accurately and propose that the controllable mixing of the spin states will enable electrically controlled quantum operations on exciton spin qubits. © 2013 American Physical Society
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CUED - Cambridge University Engineering Department
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Last time updated on 15/07/2020