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QUANTUM PHYSICS

An odd couple

Nature Physics volume 17, pages 167–168 (2021)Cite this article

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An atomic spin oscillator coupled to a mechanical membrane resonator forms an effective negative-mass oscillator. Entanglement in this hybrid quantum system is created by a backaction-evading position measurement, despite the macroscopic separation.

Our ability to control quantum behaviour has surpassed the wildest dreams of the founders of quantum mechanics. The control we now have over photons allows quantum communication across the globe via satellites1, and researchers build ever-more promising quantum computers using individual atoms and superconducting circuitry. Each quantum platform has its unique advantages and disadvantages. However, a major challenge we face when it comes to exploiting quantum physics for technology is the ability to get different systems to talk to each other, to build networks and coherently share information.

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Fig. 1: An entangled hybrid system.

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Authors and Affiliations

  1. Department of Physics, Montana State University, Bozeman, MT, USA

    Brian D’Urso

  2. Department of Physics, King’s College London, London, UK

    James Millen

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  1. Brian D’Urso
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  2. James Millen
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Correspondence to Brian D’Urso.

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D’Urso, B., Millen, J. An odd couple. Nat. Phys. 17, 167–168 (2021). https://doi.org/10.1038/s41567-020-1020-8

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  • DOI: https://doi.org/10.1038/s41567-020-1020-8

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