Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots

TL;DR

This paper experimentally demonstrates the reappearance of Rabi rotations in semiconductor quantum dots, a phenomenon previously predicted theoretically, highlighting the complex role of phonons in solid-state quantum emitters.

Contribution

First experimental observation of the reappearance of Rabi rotations in semiconductor quantum dots confirming theoretical predictions.

Findings

Reappearance of Rabi rotations observed at higher pulse powers

Phonon spectral density influences Rabi oscillation damping

Results validate theoretical models of phonon effects in quantum dots

Abstract

Phonons in solid-state quantum emitters play a crucial role in their performance as photon sources in quantum technology. For resonant driving, phonons dampen the Rabi oscillations resulting in reduced preparation fidelities. The phonon spectral density, which quantifies the strength of the carrier-phonon interaction, is non-monotonous as a function of energy. As one of the most prominent consequences, this leads to the reappearance of Rabi rotations for increasing pulse power, which was theoretically predicted in Phys. Rev. Lett. 98, 227403 (2007). In this paper we present the experimental demonstration of the reappearance of Rabi rotations.