ZhETF, Vol. 148,
p. 908 (November 2015)
(English translation - JETP,
Vol. 121, No. 5,
available online at www.springer.com
SUB-POISSONIAN PHONON STATISTICS IN AN ACOUSTICAL RESONATOR COUPLED TO A PUMPED TWO-LEVEL EMITTER
Ceban V., Macovei A.
Received: May 25, 2015
The concept of an acoustical analog of the optical laser has been developed recently in both theoretical and experimental works. We here discuss a model of a coherent phonon generator with a direct signature of the quantum properties of sound vibrations. The considered setup is made of a laser-driven quantum dot embedded in an acoustical nanocavity. The system dynamics is solved for a single phonon mode in the steady-state and in the strong quantum dot - phonon coupling regime beyond the secular approximation. We demonstrate that the phonon statistics exhibits quantum features, i. e., is sub-Poissonian.