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Many-body decoherence dynamics and optimized operation of a single-photon switch

MPG-Autoren
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Murray,  C
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Pohl,  Thomas
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Zitation

Murray, C., Gorshkov, A. V., & Pohl, T. (2016). Many-body decoherence dynamics and optimized operation of a single-photon switch. New Journal of Physics, 18: 092001. doi:10.1088/1367-2630/18/9/092001.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002B-BC47-2
Zusammenfassung
Wedevelop a theoretical framework to characterize the decoherence dynamics due to multi-photon scattering in an all-optical switch based on Rydberg atom induced nonlinearities. By incorporating the knowledge of this decoherence process into optimal photon storage and retrieval strategies, we establish optimized switching protocols for experimentally relevant conditions, and evaluate the corresponding limits in the achievable fidelities. Based on these results we work out a simplified description that reproduces recent experiments (Nat. Commun. 7 12480) and provides a new interpretation in terms of many-body decoherence involving multiple incident photons and multiple gate excitations forming the switch. Aside from offering insights into the operational capacity of realistic photon switching capabilities, our work provides a complete description of spin wave decoherence in a Rydberg quantum optics setting, and has immediate relevance to a number of further applications employing photon storage in Rydberg media.