IQIM Postdoctoral and Graduate Student Seminar

Thursday September 29, 2016 12:00 PM

A quantum gas of polar KRb molecules in an optical lattice

Speaker: Jacob Covey, Graduate Student, Jun Ye's Group, JILA/ University of Colorado, Boulder
Location: West Bridge 57 (CMP Conference Room)

Abstract: Ultracold polar molecules allow for investigation of quantum-state-controlled chemistry as well as strongly correlated many-body dynamics. After the first realization of polar molecules in the quantum regime, chemical reactions immediately became apparent in our KRb system. Upon obtaining a detailed understanding of the chemical reaction processes near absolute zero, we loaded our molecules in optical lattices that suppressed molecular reaction loss. In doing so, we were able to observe many-body spin dynamics between molecules pinned in a deep lattice, even though the filling fraction of the molecules was only ~5%. We have recently performed a thorough investigation of the molecule creation process in an optical lattice, and consequently improved our filling fraction to ~30% by preparing and overlapping Mott and band insulators of the initial atomic gases. This improvement realizes a fully connected quantum gas of polar molecules for the investigation of non-equilibrium, many-body spin dynamics. More recently, we switched to a second generation KRb apparatus that will allow application of large, stable electric fields as well as high-resolution addressing and detection of polar molecules in optical lattices. I will present our work on molecule creation in a three-dimensional optical lattice and the corresponding increase in the molecular filling fraction, as well as the status and direction of the second generation apparatus.


 

 

Series IQIM Postdoctoral and Graduate Student Seminar Series

Contact: Marcia Brown at 626-395-4013 marciab@caltech.edu