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  Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart

Karg, T. M., Gouraud, B., Ngai, C. T., Schmid, G.-L., Hammerer, K., & Treutlein, P. (2020). Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart. Science, 369(6500), 174-179. doi:10.1126/science.abb0328.

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 Creators:
Karg, Thomas M., Author
Gouraud, Baptiste, Author
Ngai, Chun Tat, Author
Schmid, Gian-Luca, Author
Hammerer, Klemens1, Author              
Treutlein, Philipp, Author
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Engineering strong interactions between quantum systems is essential for many phenomena of quantum physics and technology. Typically, strong coupling relies on short-range forces or on placing the systems in high-quality electromagnetic resonators, restricting the range of the coupling to small distances. We use a free-space laser beam to strongly couple a collective atomic spin and a micromechanical membrane over a distance of one meter in a room-temperature environment. The coupling is highly tunable and allows the observation of normal-mode splitting, coherent energy exchange oscillations, two-mode thermal noise squeezing and dissipative coupling. Our approach to engineer coherent long-distance interactions with light makes it possible to couple very different systems in a modular way, opening up a range of opportunities for quantum control and coherent feedback networks.

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 Dates: 2020-04-292020
 Publication Status: Published in print
 Pages: 24 pages, 9 figures
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Title: Science
Source Genre: Journal
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Pages: - Volume / Issue: 369 (6500) Sequence Number: - Start / End Page: 174 - 179 Identifier: -