April 13, 2007Physical Review Letters484 citationsOpen Access
Strongly Correlated Two-Photon Transport in a One-Dimensional Waveguide Coupled to a Two-Level System
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Abstract
We show that two-photon transport is strongly correlated in one-dimensional waveguide coupled to a two-level system. The exact S matrix is constructed using a generalized Bethe-ansatz technique. We show that the scattering eigenstates of this system include a two-photon bound state that passes through the two-level system as a composite single particle. Also, the two-level system can induce effective attractive or repulsive interactions in space for photons. This general procedure can be applied to the Anderson model as well.