Precision of the acoustic control of single photon scattering with semiconductor quantum dots

TL;DR

This paper theoretically analyzes how acoustic modulation can control single-photon scattering in semiconductor quantum dots, emphasizing the importance of phase stability and noise management for effective control.

Contribution

It develops a theoretical framework for low-intensity resonance fluorescence under acoustic modulation, highlighting conditions for high control fidelity in quantum dot photon scattering.

Findings

High control is possible with two-tone acoustic fields under specific modulation amplitudes.

Phase stability over 10^4 to 10^5 acoustic periods is necessary for effective control.

Control effectiveness diminishes if noise-induced phase diffusion exceeds acoustic frequency by an order of magnitude.

Abstract

Acoustic modulation of quantum dots allows one to control the scattering of photons. Here we theoretically characterize the degree of this acoustic control in the frequency domain. We formulate the theory of low-intensity resonance fluorescence in the presence of white noise and show that a high level of control is achievable with a two-tone acoustic field for appropriate settings of modulation amplitudes as long as the noise-induced phase diffusion coefficient remains one order of magnitude smaller than the acoustic frequency. In addition, using a quantitative model of optical signal collection, we determine that the acoustic phase must be stable over $\mathbf{10^4}$ to $\mathbf{10^5}$ acoustic periods for efficient control.