Berlin 2024 – scientific programme

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QI: Fachverband Quanteninformation

QI 18: Poster II

QI 18.3: Poster

Wednesday, March 20, 2024, 11:00–14:30, Poster A

Quantum acoustics for high frequency gravitational wave sensing — •Marius Bild, Andraz Omahen, Dario Scheiwiller, Matteo Fadel, and Yiwen Chu — ETH Zürich, Labor für Festkörperphysik, Otto-Stern-Weg 1, 8093 Zürich

Mechanical resonators are emerging as an important new platform for quantum science and technologies. In particular, interfacing a bulk acoustic resonator with a superconducting qubit enables the creation and control of quantum states of mechanical motion that can be assigned macroscopic masses, useful for tests of fundamental quantum mechanics as well as in quantum sensing experiments. For example, the high intrinsic sensitivity to metric perturbations of space time, makes bulk acoustic resonators prime candidates for compact sensors of high frequency gravitational waves. Here we show how gravitational wave amplitudes can be bound by precise temperature measurements of the phonon modes in our devices, as well as how quantum states with high Fisher information can achieve quantum enhanced sensitivities.

Keywords: Quantum Acoustics; Gravitational Waves; Quantum sensing; Superconducting Qubits; Thermometry