AUTHOR=Jiao Yuechun , Bai Jingxu , Song Rong , Bao Shanxia , Zhao Jianming , Jia Suotang 

TITLE=Electric Field Tuned Dipolar Interaction Between Rydberg Atoms

JOURNAL=Frontiers in Physics

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.892542

DOI=10.3389/fphy.2022.892542

ISSN=2296-424X

ABSTRACT=We demonstrate a tuned dipole interaction between Rydberg atoms by employing a controllable electric field in a cold cesium ensemble. The $|n\mathrm{P}_{3/2}\rangle$ ($n$=38-40) Rydberg pair are prepared with a three-photon scheme and detected via the state selective field ionization technique. A weak dc electric field is used to tune Rydberg pair interaction from the van der Waals interaction regime to the dipole-dipole interaction regime. The F\"{o}rster resonant interaction and an adiabatic resonance energy transfer between the $n\mathrm{P}$ and $n\mathrm{S}$ Rydberg states are attained by precisely tuning electric field. Rydberg excitation blockade with and without the electric field are investigated by changing the excitation pulse duration, which display that the dipole interaction induced blockade effect is stronger than the van der Waals interaction induced blockade effect. The precise control of the Rydberg interaction is of great significance to the coherent interaction in many-body systems and non-radiative collision processes.