Electron teleportation between quantum dots using virtual dark exciton

TL;DR

This paper proposes a quantum dot electron teleportation mechanism utilizing virtual excitons that transform between bright and dark states through Coulomb exchange, enabling electron transfer without physical tunneling.

Contribution

It introduces a novel teleportation method based on exciton state transformations mediated by many-body effects in composite bosons.

Findings

Demonstrates electron teleportation via exciton state conversion.

Utilizes Shiva diagrams to elucidate many-body interactions.

Proposes a feasible mechanism for quantum information transfer.

Abstract

We here propose a mechanism to teleport electrons between quantum dots through the transformation of a virtual bright exciton into a dark exciton. This mechanism relies on the interactions of two composite bosons: a pair of electrons with opposite spins, trapped in two dots and an electron-hole pair in a free exciton coupled to an unabsorbed pump pulse, which makes it ``bright'' but virtual. This bright exciton first turns ``dark'' by dropping its electron and stealing the trapped electron with opposite spin through an exchange Coulomb process with the trapped pair. In a second step, the dark exciton ``flies'' with its electron to the other dot where it turns bright again, by the inverse process. The ``Shiva diagrams'' for composite boson many-body effects that we have recently introduced, enlighten this understanding.