Atomic, Molecular, and Optical Physics Seminar
Spin Waves in an Ultra-Cold Atomic Vapor
We have developed a novel system to create ultra-cold samples of rubidium-87. Our system mechanically transfers atoms from a vapor cell magneto-optical trap to a region of ultra-high vacuum, and a uses a novel Ioffe-Pritchard trap made from both permanent and electromagnets for evaporative cooling. Trapped atoms can be put into a coherent superposition of hyperfine states and Ramsey spectroscopy is used to precisely measure their energy difference. Shifts in the energy between states due to magnetic fields and collisions are observed. We have also observed spin waves, which arise from collisions between atoms within the sample.
Monday, November 1, 2004
Gant Science Complex