Simulations Of Magnetic Field Gradients Due To Micro-Magnets On A Triple Quantum Dot Circuit

G Poulinlamarre,Chloe Bureauoxton,A Kam,P Zawadzki,S A Studenikin,G C Aers,M Pioroladriere,A S Sachrajda

PHYSICS OF SEMICONDUCTORS（2013）

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Abstract

To quantify the effects of local magnetic fields on triple quantum dots, the Heisenberg Hamiltonian has been diagonalized for three electrons coupled via the exchange interaction. In particular, we have investigated different geometries of micro-magnets located on top of the triple dot in order to optimize the field gradient characteristics. In this paper, we focus on two geometries which are candidates for an addressable EDSR triple quantum dot device.

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Key words

Micro-magnets, Quantum dots, EDSR

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