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Single-photon bound states in atomic ensembles

September 14, 2018 - 12:00pm
Speaker: 
Yidan Wang
Institution: 
JQi

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.

*Lunch will be provided at 12:00 noon with the talk beginning at 12:15pm*
 
PSC 2136