Realizing A 85Rb-87Rb Ultracold Mixture And The Study Of Broad P-wave Feshbach Resonances

In this thesis,I will describe the⁸⁵Rb-⁸⁷Rb ultracold mixture experimental system and our preliminary research in Feshbach resonances in this mixture.As the designer and the first student on this experiment,I will introduce this second ultracold atom sys-tem of our group,which can be used to study ultracold Rydberg atom physics and⁸⁵Rb-⁸⁷Rb ultracold mixture Feshbach resonance physics.This thesis covers the designing,constructing and assembling of the vacuum system,laser system,time-sequence sys-tem,microwave system,magnetic field control system,electric field control system,in-situ imaging system,ion-detection system.I'll also briefly introduce our prelimi-nary research for Feshbach resonances in the⁸⁵Rb-⁸⁷Rb ultracold mixture,in which we observed a series of predicted Feshbach resonances with observed features,including the doublet structure,asymmetry dependent width for the broad p-wave Feshach res-onances.By combining the theory from Prof.Bo Gao from University of Toledo and our experiment,we confirm the existence of high partial-wave Feshbach resonances including a dramatically broad p-wave resonance.This work on Feshbach resonance is directed at an easily realized binary alkali atom mixture that has so far been signifi-cantly less visited.The ultracold Rydberg atom and⁸⁵Rb-⁸⁷Rb ultracold mixture experimental plat-form can be used to study a variety of physical phenomena involving strong interaction such as the Rydberg blockade and non-zero partial-wave Feshbach resonances.This platform will support our efforts in cold atom physics and to make further study in this field both theocratically and experimentally.Our preliminary result on the borad p-wave Feshbach resonances in the⁸⁵Rb-⁸⁷Rb ultracold mixture suggests exciting op-portunities for investigating universal few-body and many-body behaviors with strong coupling in nonzero partial waves,including p-wave bosonic superfluid mixture,three-body recombination decay,and formation of p-wave heteronuclear molecules.