Title: Sub-lattice addressable qubit-control in an optical lattice and multi-photon laser cooling and trapping
I will talk about recent progress on two experiments. First, I will discuss experiments to addressably control an arbitrary qubit state of 87Rb atoms held in an optical lattice. Our approach is to map a qubit state stored in a long-lived hyperfine clock state into another pair of clock states, where the qubit state can be controlled independently of neighboring atoms. This four-state scheme allows for addressable control while maintaining the long-lived coherence associated with clock states.
In the second experiment, I will discuss our recent demonstration of multi-photon (multiple wavelength) laser cooling and trapping of cesium. Instead of using just the traditional single cycling transition, we add additional lasers that couple only excited states, providing cooling that depends on two- and three-photon absorption. Interestingly, the atoms can be efficiently cooled along directions that have entirely stimulated processes. Our scheme may have implications for background-free detection of single atom MOTs.
10 Minute Talk: Ground state phase diagram of the two-component Bose-Hubbard model