Journal of Physics A Mathematical and Theoretical

Coherent state excitons in anisotropic quantum dots: classical and quantum correlations

Alagu Thilagam

Published May 30, 2012• 0 citations

Abstract

We investigate the entanglement dynamics of excitons confined in two adjacent quantum dots, which we describe through their algebraic properties using in the z -direction. We use two explicit forms of coherent states: the Perelomov and Barut–Girardello states to represent the electronic component of the excitonic state in the z -direction. Our results show that in a coherent state basis, the concurrence of an excitonic-qubit pair shows subtle variations which are dependent on the algebraic parameters of the group. These variations also appear in the classical and quantum correlations, present in the qubit–qubit density matrix that is associated with the purely Förster-coupled excitonic-qubit pair. A brief discussion of a plausible experimental technique of detecting excitonic coherent states is provided. This article is part of a special issue of Journal of Physics A: Mathematical and Theoretical devoted to 'Coherent states: mathematical and physical aspects'.

DOI: 10.1088/1751-8113/45/24/244012

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