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Quantum entanglement in lateral GaAs/AlGaAs quantum dot molecules

We calculate the excitonic structure of pairs of GaAs/AlGaAs quantum dots forming lateral molecules and obtain the entanglement of exciton states. The following advantages of the lateral geometry over the vertical one are found: (1) The energy structures of the dots forming a molecule can be in prin...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-09, Vol.245 (1), p.012027
Main Authors: Křápek, V, Klenovský, P, Rastelli, A, Schmidt, O G, Munzar, D
Format: Article
Language:English
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Summary:We calculate the excitonic structure of pairs of GaAs/AlGaAs quantum dots forming lateral molecules and obtain the entanglement of exciton states. The following advantages of the lateral geometry over the vertical one are found: (1) The energy structures of the dots forming a molecule can be in principle identical. (2) Comparable tunneling of electrons and holes ensures a high entanglement of antisymmetric excitons. A drawback of existing structures are very low tunneling energies, which make the entanglement vulnerable against differences in the sizes and shapes of both dots.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/245/1/012027