Biexcitons in Coupled Quantum Dots as a Source for Entangled Photons

Preprint

12 September 2001

preprint
Published by arXiv in arXiv

Abstract

We study biexcitonic states in two tunnel-coupled semiconductor quantum dots and show that they provide a source for entangled photons which are spatially separated at production. We distinguish between the various spin configurations and calculate the low-energy biexciton spectrum using the Heitler-London approximation as a function of magnetic and electric fields. We calculate the oscillator strengths for the biexciton recombination involving the sequential emission of two photons with entangled polarizations corresponding to the spin configuration in the biexciton states.

Keywords

APPROXIMATION AS A FUNCTION
PHOTONS WITH ENTANGLED
OSCILLATOR STRENGTHS
SOURCE FOR ENTANGLED
SPIN CONFIGURATION
BIEXCITON STATES
RECOMBINATION
QUANTUM DOTS

All Related Versions

Version 1, 2001-09-12, ArXiv
Version 2, 2002-05-27, ArXiv
Published version: Physical Review B, 65 (20), 205329.

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