August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【434】Strong coupling of a mechanical oscillator and atomic spins 1 m apart

Sep 1, 2021, 5:45 PM
Room E

Room E

Talk Atomic Physics and Quantum Optics Atomic Physics and Quantum Optics


Chun Tat Ngai (Universität Basel)


Many of the breakthroughs in quantum science and technology rely on engineering strong Hamiltonian interactions between quantum systems. Typically, strong coupling relies on short-range forces or on placing the systems in high-quality electromagnetic resonators, which restricts the range of the coupling to short distances. We show how a loop of laser light can generate Hamiltonian coupling over a distance and report experiments using this approach to strongly couple a nanomechanical membrane oscillator and an atomic spin ensemble across one meter in a room-temperature environment. We observe spin-membrane normal mode splitting, coherent energy exchange oscillations, two-mode thermal noise squeezing, dissipative coupling with exceptional points, and sympathetic cooling of the membrane. Our experiments demonstrate the versatility and flexibility of light-mediated interactions, a powerful tool for quantum science that offers many further possiblities and is readily applicable to a variety of different systems.

Primary authors

Chun Tat Ngai (Universität Basel) Gian Luca Schmid (Universität Basel) Maryse Ernzer (Universität Basel) Manel Bosch (Universität Basel) Thomas Michael Karg (Universität Basel) Baptiste Gouraud (Universität Basel) Klemens Hammerer Philipp Treutlein (University of Basel)

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