Title: Ultralow-light-level manipulation with thermal vapors in miniaturized devices

Speaker: Prof. Yi-Hsin Chen, National Sun Yat-sen University 

Time: Oct.  19, 1:20 p.m

Place:  R124, Physics Department

Abstract:
I will first give an overview of our previous works in cold atomic systems, including 
the studies of electromagnetically induced transparency (EIT), Rydberg-state EIT, and 
quantum-state manipulation. Then I will present the study in miniaturized systems with 
thermal vapors such as optical nanofibers, photonic crystal fibers, microcells, and 
waveguides. The all-glasses or all-fiber devices can be used as the portable quantum 
sensors. Combined with Rydberg atoms, the systems are able to form multiple quantum 
bits and quantum gates in these strongly nonlinear atomic medium. I will mention the 
method to generate single-photon source based on strongly interacting Rydberg atoms 
via four-wave-mixing (FWM) scheme and photon blockade effect from a microcell. 
Finally, a proposal of building an array of Rydberg atoms in the miniaturized systems will be discussed.