Collision Characteristics between Ultracold Cesium &amp;lt;i&amp;gt;nP&amp;lt;/i&amp;gt; Rydberg Atoms

Zhigang Feng,Xin Zhou,Hongying Gao,Zheng Liu,Bo Li

doi:10.4236/jmp.2018.95053

Abstract

We investigate the effect of van der Waals interactions and dipole-dipole interactions on collisional loss rate coefficients of Cs Rydberg nP states, and in detail analyze the variation of collisional loss coefficients under the initial Rydberg atomic velocity and van der Waals interactions. We obtain the total collisional loss coefficients for different nP states, and provide the possible ionization mechanism for the results of experimental observation using our analysis model.

Highlights

The ultracold Rydberg atoms have been extensively studied due to their strong and controllable long-rang interactions
We investigate the effect of van der Waals interactions and dipole-dipole interactions on collisional loss rate coefficients of Cs Rydberg nP states, and in detail analyze the variation of collisional loss coefficients under the initial Rydberg atomic velocity and van der Waals interactions
The dipole blockade effects based on ultracold Rydberg atoms have been experimentally studied for van der Waals interaction case by changing density or the principal quantum number of Rydberg state [3] [4], and for the dipole-dipole interaction case by tuning an electric field [5]

Summary

Introduction

The ultracold Rydberg atoms have been extensively studied due to their strong and controllable long-rang interactions. The dipole blockade effects based on ultracold Rydberg atoms have been experimentally studied for van der Waals interaction case by changing density or the principal quantum number of Rydberg state [3] [4], and for the dipole-dipole interaction case by tuning an electric field [5]. We investigate the important role of initial van der Waals interaction in total collision process for attractive and repulsive case, in detail analyze the effect on the total collisional loss rate, and improve the analytical formula for both cases. This content has not been studied in previous papers

Theoretical and Analysis

Conclusion