The concept of an acoustical analog of the optical laser has been developed recently both in theoretical as well as experimental works. We discuss here a model of a coherent phonon generator with a direct signature of quantum properties of the sound vibrations. The considered setup is made of a laser driven quantum dot (QD) embedded in an acoustical nanocavity. The system's dynamics is solved for a single phonon mode in the steady-state and in the strong QD-phonon coupling regime beyond the secular approximation. We demonstrate that the phonon statistics exhibits quantum features, i.e. sub-Poissonian phonon statistics.
@article{arxiv.1502.01198,
title = {Phonon statistics in an acoustical resonator coupled to a pumped two-level emitter},
author = {Victor Ceban and Mihai A. Macovei},
journal= {arXiv preprint arXiv:1502.01198},
year = {2015}
}