von Reppert, A.; Bargheer, M.: Listening to the silence of quantum processes. Nature Materials 24 (2025), p. 1158-1159
10.1038/s41563-025-02264-0
Abstract:
Narrow exciton-polariton resonances in multiple quantum wells enable picosecond ultrasonics to detect coherent acoustic wave packets near the single-phonon quantum limit.