Symmetry-protected collisions between strongly interacting photons

Jeff D. Thompson, Travis L. Nicholson, Qi-Yu Liang, Sergio H. Cantu, Aditya V. Venkatramani, Soonwon Choi, Ilya A. Fedorov, Daniel Viscor, Thomas Pohl, Mikhail D. Lukin () and Vladan Vuletić ()
Additional contact information
Jeff D. Thompson: Harvard University
Travis L. Nicholson: Massachusetts Institute of Technology
Qi-Yu Liang: Massachusetts Institute of Technology
Sergio H. Cantu: Massachusetts Institute of Technology
Aditya V. Venkatramani: Harvard University
Soonwon Choi: Harvard University
Ilya A. Fedorov: Russian Quantum Center
Daniel Viscor: Max Planck Institute for the Physics of Complex Systems
Thomas Pohl: Max Planck Institute for the Physics of Complex Systems
Mikhail D. Lukin: Harvard University
Vladan Vuletić: Massachusetts Institute of Technology

Nature, 2017, vol. 542, issue 7640, 206-209

Abstract: Excitations to Rydberg states in a gas of ultracold atoms are used to produce a robust, nonlinear phase shift of exactly π/2 between two photons, which is protected against variations in experimental parameters by a symmetry of the system.

Date: 2017
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DOI: 10.1038/nature20823

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