Massive creation of entangled exciton states in semiconductor quantum dots

TL;DR

This paper demonstrates that intense laser pulses can generate highly entangled exciton states in semiconductor quantum dots, with potential for quantum information applications, and proposes experimental methods to observe this phenomenon.

Contribution

It introduces a novel method for creating entangled exciton states in quantum dots using self-induced transparency with intense laser pulses.

Findings

Entangled biexciton coherence is generated without populating single-exciton states.

Self-induced transparency enables the creation of entangled states in inhomogeneously broadened quantum dots.

Proposed experimental techniques facilitate observation of the entangled exciton states.

Abstract

An intense laser pulse propagating in a medium of inhomogeneously broadened quantum dots massively creates entangled exciton states. After passage of the pulse all single-exciton states remain unpopulated (self-induced transparency) whereas biexciton coherence (exciton entanglement) is generated through two-photon transitions. We propose several experimental techniques for the observation of such unexpected behavior.