Squeezing the collective spin of a dilute atomic ensemble by cavity feedback

We propose and analyze a simple method to squeeze dynamically and unconditionally the collective spin of a dilute atomic ensemble by interaction with a driven mode of an optical resonator, as recently demonstrated [I. D. Leroux, M. H. Schleier-Smith, and V. Vuletic, Phys. Rev. Lett. 104, 073602 (201...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-02, Vol.81 (2), Article 021804
Main Authors: Schleier-Smith, Monika H., Leroux, Ian D., Vuletić, Vladan
Format: Article
Language:English
Subjects:
ANGULAR MOMENTUM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTRONIC EQUIPMENT
EMISSION
FEEDBACK
INTERACTIONS
PARTICLE PROPERTIES
PHOTON EMISSION
RESONATORS
SPIN
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Summary:We propose and analyze a simple method to squeeze dynamically and unconditionally the collective spin of a dilute atomic ensemble by interaction with a driven mode of an optical resonator, as recently demonstrated [I. D. Leroux, M. H. Schleier-Smith, and V. Vuletic, Phys. Rev. Lett. 104, 073602 (2010)]. We show that substantial squeezing can be achieved in the regime of strong collective ensemble-resonator coupling. The squeezing is ultimately limited either by photon emission into free space or by the curvature of the Bloch sphere. We derive both limits and show where each prevails.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.81.021804