Interaction of quantum dot molecules with multi-mode radiation fields

Details Interaction of quantum dot molecules with multi-mode radiation fields Interaction of quantum dot molecules with multi-mode radiation fields

2009-11-09

arxiv.org/abs/0911.1630v2

Physics

Quantum Physics

accepted for publication in Scientia Iranica

Scientific paper

In this article, the interaction of an arbitrary number of quantum dots, behaving as artificial molecules, with different energy levels and multi-mode electromagnetic field is studied. We make the assumption that each quantum dot can be represented as an atom with zero kinetic energy, and that all excitonic effects except dipole-dipole interactions may be disregarded. We use Jaynes-Cummings-Paul model with applications to quantum systems based on a time-dependent Hamiltonian and entangled states. We obtain a system of equations describing the interaction and present a method to solve the equations analytically for a single mode field within the Rotating-Wave Approximation. As an example of the applicability of this approach, we solve the system of two two-level quantum dots in a lossless cavity with two modes of electromagnetic field. We furthermore study the evolution of entanglement by defining and computing the concurrency.

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