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Title: Solving the scattering of N photons on a two-level atom without computation
Authors: Roulet, A 
Scarani, V 
Keywords: Light
Quantum theory
Atomic excitations
Atomic response
Feynman diagrams
One-dimensional waveguides
Physical quantities
Scattering events
Two-level atom
Issue Date: 2016
Publisher: Institute of Physics Publishing
Citation: Roulet, A, Scarani, V (2016). Solving the scattering of N photons on a two-level atom without computation. New Journal of Physics 18 (9) : 93035. ScholarBank@NUS Repository.
Abstract: We propose a novel approach for solving the scattering of light onto a two-level atom coupled to a one-dimensional waveguide. First we express the physical quantity of interest in terms of Feynman diagrams and treat the atom as a non-saturable linear beamsplitter. By using the atomic response to our advantage, a relevant substitution is then made that captures the nonlinearity of the atom, and the final result is obtained in terms of simple integrals over the initial incoming wavepackets. The procedure is not limited to post-scattering quantities and allows for instance to derive the atomic excitation during the scattering event. © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Source Title: New Journal of Physics
ISSN: 1367-2630
DOI: 10.1088/1367-2630/18/9/093035
Appears in Collections:Staff Publications

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