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Thomas Pohl

Photon Subtraction by Many-Body Decoherence

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  • C. R. Murray
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  • I. Mirgorodskiy, Univ Stuttgart, University of Stuttgart, Ctr Integrated Quantum Sci & Technol
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  • C. Tresp, Univ Southern Denmark, University of Southern Denmark, Dept Phys Chem & Pharm
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  • C. Braun, Univ Southern Denmark, University of Southern Denmark, Dept Phys Chem & Pharm
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  • A. Paris-Mandoki, Univ Southern Denmark, University of Southern Denmark, Dept Phys Chem & Pharm
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  • A. V. Gorshkov, Univ Maryland, University System of Maryland, University of Maryland College Park, National Institute of Standards & Technology (NIST) - USA, NIST, Joint Quantum Inst, Univ Maryland, National Institute of Standards & Technology (NIST) - USA, University System of Maryland, University of Maryland College Park, NIST, Joint Ctr Quantum Informat & Comp Sci
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  • S. Hofferberth, Univ Southern Denmark, University of Southern Denmark, Dept Phys Chem & Pharm
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  • T. Pohl

We experimentally and theoretically investigate the scattering of a photonic quantum field from another stored in a strongly interacting atomic Rydberg ensemble. Considering the many-body limit of this problem, we derive an exact solution to the scattering-induced spatial decoherence of multiple stored photons, allowing for a rigorous understanding of the underlying dissipative quantum dynamics. Combined with our experiments, this analysis reveals a correlated coherence-protection process in which the scattering from one excitation can shield all others from spatial decoherence. We discuss how this effect can be used to manipulate light at the quantum level, providing a robust mechanism for single-photon subtraction, and experimentally demonstrate this capability.

Original languageEnglish
Article number113601
JournalPhysical Review Letters
Volume120
Issue11
Number of pages6
ISSN0031-9007
DOIs
Publication statusPublished - 13 Mar 2018

    Research areas

  • QUANTUM NONLINEAR OPTICS, SINGLE-PHOTON, TRAPPED ATOM, DISSIPATION, MOLECULE, DRIVEN, SWITCH, STATES

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