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IBS CMSD Seminar_Prof. Han Seb Moon(Pusan University)(May 2, 2019)

작성자 : Center for Molecular Spectroscopy and Dynamics 등록일 : 2019-04-29 조회수:248


      IBS Center for Molecular Spectroscopy and Dynamics

 

Seminar

 

 

        SPEAKER
Prof. Han Seb Moon (Pusan University)


        TITLE
Polarization-Entangled Photons from Warm Atomic Ensemble using Sagnac Interferometer


     ABSTRACT
   We report a polarization-entangled photon-pair source obtained via spontaneous four-wave mixing (SFWM) in a Doppler-broadened atomic ensemble of 87Rb atoms using a Sagnac interferometer. Collective two-photon coherence occurs in the Doppler-broadened ladder-type atomic system with bidirectional counter-propagating two-photon resonant pump and coupling fields; hence, polarization-entangled photon-pairs are collectively radiated in the phase-matched direction. Without phase stabilization of the interferometry for polarization entanglement, we robustly produce all four Bell states via a polarization Sagnac configuration. The brightness, stability, and temporal purity advantages provided by our polarization-entangled SFWM photon-pair source have very important applications in the context of a practical scalable quantum network.


     DATE AND VENUE
 May 2, 2019 (Thursday, 4:00 - 5:00 pm)  

Seminar Room A (116), KU R&D Center


        LANGUAGE
Korean


        INVITED BY
Associate Director Wonshik Choi