Experimental Study of Delocalization of Matter Waves with Bose Einstein Condensate

Khemendra Shukla^1*, Po-Sung Chen¹, Yi-Wei Liu¹

¹Department of Physics, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Khemendra Shukla, email:s105022858@m105.nthu.edu.tw

Coherent matter waves are consist of many particle wave functions but behave like single particle wave function. This phenomenon led us to develop another approach to quantum simulator of molecules. In this work, we investigate the dynamics of Bose Einstein condensate in an anharmonic trap potential. We have realized Bose Einstein condensate of 3x10^{5 87}Rb atoms trapped in a crossed optical dipole trap (ODT) potential. A pulsed atom laser with 71Hz repetition rate is produced by ramping down the ODT power. In the next stage, we study the dynamics of the condensate by releasing it from ODT and loading to the anharmonic trap potential. We observed that atomic cloud exhibits an interference fringe pattern after multiple bouncing in the anharmonic trap. This interference pattern depends on the initial conditions of the condensate such as number and initial velocity of the atomic cloud. De-localization of matter waves evolves with the dynamics of condensate in the anharmonic trap potential.

Keywords: Bose Einstein Condensate, Pulsed Atom Laser, Quantum Simulator