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=10

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=<p>We demonstrated a tuned dipole interaction between Rydberg atoms by employing a controllable electric field in a cold cesium ensemble. The |<italic>n</italic>P<sub>3/2</sub>⟩ (<italic>n</italic> = 38–40) Rydberg pairs are prepared with a three-photon scheme and detected <italic>via</italic> the state-selective field ionization technique. A weak DC electric field is used to tune the Rydberg pair interaction from the van der Waals interaction regime to the dipole–dipole interaction regime. The Förster resonant interaction and an adiabatic resonance energy transfer between the <italic>n</italic>P and <italic>n</italic>S Rydberg states are attained by precisely tuning the electric field. Rydberg excitation blockade with and without the electric field is investigated by changing the excitation pulse duration, which demonstrates 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.</p>