Creation of entangled states in coupled quantum dots via adiabatic rapid passage

TL;DR

This paper proposes a feasible adiabatic rapid passage protocol to create entangled states in coupled quantum dots, with potential applications across various quantum systems, advancing quantum information processing methods.

Contribution

It introduces a novel adiabatic rapid passage method for entangling coupled quantum dots, demonstrating feasibility with realistic parameters and broad applicability to other quantum systems.

Findings

Feasible protocol for entanglement in quantum dots using adiabatic rapid passage

Quantitative analysis with realistic semiconductor parameters

Potential transferability to other quantum physical systems

Abstract

Quantum state preparation through external control is fundamental to established methods in quantum information processing and in studies of dynamics. In this respect, excitons in semiconductor quantum dots (QDs) are of particular interest since their coupling to light allows them to be driven into a specified state using the coherent interaction with a tuned optical field such as an external laser pulse. We propose a protocol, based on adiabatic rapid passage, for the creation of entangled states in an ensemble of pairwise coupled two-level systems, such as an ensemble of QD molecules. We show by quantitative analysis using realistic parameters for semiconductor QDs that this method is feasible where other approaches are unavailable. Furthermore, this scheme can be generically transferred to some other physical systems including circuit QED, nuclear and electron spins in solid-state environments, and photonic coupled cavities.