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    Experimental Measurement of the Reappearance of Rabi Rotations in Semiconductor Quantum Dots

    Lukas Hanschke1,*,†, Thomas K. Bracht2,*, Eva Schöll1,‡, David Bauch1, Eva Berger1, Patricia Kallert1, Melina Peter3, Ailton J. Garcia, Jr.3, Saimon F. Covre da Silva3,§ et al.

    Santanu Manna3,∥, Armando Rastelli3, Stefan Schumacher1, Doris E. Reiter2, and Klaus D. Jöns1

    • 1Institute for Photonic Quantum Systems (PhoQS), Center for Optoelectronics and Photonics Paderborn (CeOPP) and Department of Physics, Paderborn University, 33098 Paderborn, Germany
    • 2Condensed Matter Theory, TU Dortmund, 44227 Dortmund, Germany
    • 3Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, 4040 Linz, Austria

    • *These authors contributed equally to this work.
    • †Present address: Walter Schottky Institut, TUM School of Computation, Information and Technology and MCQST, Technical University of Munich, 85748 Garching, Germany.
    • ‡Present address: Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, 4040 Linz, Austria.
    • §Present address: Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil.
    • ∥Present address: Indian Institute of Technology, Delhi, New Dehli, India.
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    Phys. Rev. Lett. 135, 263602 – Published 26 December, 2025

    DOI: https://doi.org/10.1103/s212-43gs

    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 state-preparation fidelities. The phonon spectral density, which quantifies the strength of the carrier-phonon interaction, is nonmonotonic as a function of energy. As one of the most prominent consequences, this should lead to the reappearance of Rabi rotations for increasing pulse power, according to the theoretical predictions in Vagov et al. [Phys. Rev. Lett. 98, 227403 (2007)]. In this Letter, we present the experimental demonstration of the reappearance of Rabi rotations for a resonantly driven quantum dot.

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    Phys. Rev. Lett. 135, 263602– Published 26 December, 2025
    • Received 7 February 2025
    • Accepted 3 November 2025
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