Exchange Energy in Asymmetric Double Quantum Dots
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Abstract: Exchange interaction in Si double quantum dots, which have been suggested as appropriate candidates for spin qubits because of their long spin coherence durations, is investigated here. Using three distinct models of the double quantum dot (DQDs) potential as a function the inter-dot distance (d) and of the electric field (E), inside the Heitler-London (HL) and Hund-Mulliken (HM) approximations, we derive the J-interaction. In a connected double quantum dot (DQD), we evaluate the J-interaction between triplet and singlet states using COMSOL Multiphysics wave functions. Considering several potentials, this computation is carried out inside a specified area of interest. We compare these results with a case in which the 1D Schrödinger problem has precisely known solutions.
Keywords: Double quantum dots; Exchange interaction; Quantum computing.
Title: Exchange Energy in Asymmetric Double Quantum Dots
Author: Emad S. Taiyh, Sabah M. M. Ameen
International Journal of Novel Research in Physics Chemistry & Mathematics
ISSN 2394-9651
Vol. 11, Issue 2, May 2024 - August 2024
Page No: 59-71
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 12-August-2024
DOI: https://doi.org/10.5281/zenodo.13304928
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Exchange Energy in Asymmetric-13082024-7.pdf
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