讲座题目：Waveguide-coupled single collective excitation of atomic arrays
主讲人：Dr. Neil Corzo
Professor Neil Corzo received his PhD degree from CINVESTAV-México in 2012. During his PhD, he did a 4-year-long research stay at the Laser Cooling and Trapping Group at NIST (Maryland, USA). He did two postdoctoral research stays, the first one at Northwestern University (Illinois, USA), and the second one at the Laboratoire Kastler Brossel (Paris, France). For the latter, he was awarded a Marie Curie Individual Fellowship from the European Commission (2014-2016). Currently, he is a Professor CINVESTAV-México.
Reversible light-matter interfaces are crucial elements in quantum optics and quantum information networks. In particular, the coupling of nanophotonic devices and cold neutral atoms appears as a promising pathway to obtain not only better scalability and figures of merit than in free-space implementations, but also new paradigms for atom–photon interactions. To this end, dielectric waveguides offer a promising platform for such integration because they enable tight transverse confinement of the propagating light, strong photon–atom coupling in single-pass configurations and potentially long-range atom–atom interactions mediated by the guided photons. However, the preparation of non-classical quantum states in such atom–waveguide interfaces has not yet been realized.
In this talk, I will present the first experimental realization of the coupling between a single collective atomic excitation and a nanoscale waveguide. The stored collective entangled state can be efficiently read out with an external laser pulse, leading to on-demand emission of a single photon into the guided mode.
This result demonstrates a capability that is essential for the emerging field of waveguide quantum electrodynamics, with applications to quantum networking, quantum nonlinear optics and quantum many-body physics.
 N. V. Corzo et. al., Waveguide-coupled single collective excitation of atomic arrays. Nature 566, 359–362 (2019)