Two-Photon Quantum Interference Observed in Ultracold Atom System (1): Cesium Atom 6s-6d Two-Photon Interference Spectrum

Project Details


Cesium atom 6S-6D spectrum is significant for setting up suitable sets of bases for constructing wavefunction via B-Spline. Two-photon transition induced transparency with 6D1/26D3/2 transitions benefits, comparing with that performed by one-photon transition, for free AC stark shift and free power broadening, which is very promising for building up a novel secondary time standard.This project proposes to build up an 855-nm cesium-stabilized diode laser and a cesium MOT system to observe the quantum interference between two pathways of cesium two-photon transition, namely, 6D1/2, F=36D3/2, F=5 and 6D1/2, F=46D3/2, F=5.
Effective start/end date1/08/1831/07/19

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 11 - Sustainable Cities and Communities
  • SDG 16 - Peace, Justice and Strong Institutions
  • SDG 17 - Partnerships for the Goals


  • two-photon transition
  • electromagnetic induced transparency
  • light broadening
  • light shift
  • quantum interference
  • ultracold atom


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