TY - JOUR T1 - Single-photon bound states in atomic ensembles Y1 - 2018 A1 - Yidan Wang A1 - Michael Gullans A1 - Antoine Browaeys A1 - J. V. Porto A1 - Darrick E. Chang A1 - Alexey V. Gorshkov AB -

We illustrate the existence of single-excitation bound states for propagating photons interacting with N two-level atoms. These bound states can be calculated from an effective spin model, and their existence relies on dissipation in the system. The appearance of these bound states is in a one-to-one correspondence with zeros in the single-photon transmission and with divergent bunching in the second-order photon-photon correlation function. We also formulate a dissipative version of Levinson's theorem for this system by looking at the relation between the number of bound states and the winding number of the transmission phases. This theorem allows a direct experimental measurement of the number of bound states using the measured transmission phases.

UR - https://arxiv.org/abs/1809.01147 ER -