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Phys Rev Lett. 2011 Jun 3;106(22):223601. Epub 2011 Jun 2.

Quantum optomechanics of a Bose-Einstein antiferromagnet.

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  • 1B2 Institute, Department of Physics and College of Optical Sciences, The University of Arizona, Tucson, Arizona 85721, USA.


We investigate the cavity optomechanical properties of an antiferromagnetic Bose-Einstein condensate, where the role of the mechanical element is played by spin-wave excitations. We show how this system can be described by a single rotor that can be prepared deep in the quantum regime under realizable experimental conditions. This system provides a bottom-up realization of dispersive rotational optomechanics, and opens the door to the direct observation of quantum spin fluctuations.

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