Proposal for geometric generation of a biexciton in a quantum dot using a chirped pulse

TL;DR

This paper introduces a robust, geometric method using chirped laser pulses to generate biexcitons in quantum dots, offering advantages over traditional two-photon schemes.

Contribution

It presents a novel geometric control technique employing frequency-sweeping pulses for biexciton creation, improving robustness and efficiency.

Findings

Method is robust against pulse area uncertainty.

Process is resilient to detuning and dephasing.

Speed constrained by biexciton binding energy.

Abstract

We propose to create a biexciton by a coherent optical process using a frequency-sweeping (chirped) laser pulse. In contrast to the two-photon Rabi flop scheme, the present method uses the state transfer through avoided level crossing and is a geometric control. The proposed process is robust against pulse area uncertainty, detuning, and dephasing. The speed of the adiabatic operation is constrained by the biexciton binding energy.