J. Phys. IV France 116 (2004) 265-274
Using magnetic chip traps to study Tonks-Girardeau quantum gasesJ. Reichel1 and J.H. Thywissen2
1 Max-Planck-Institut für Quantenoptik and Sektion Physik der Ludwig-Maximilians-Universität, Schellingstr. 4, 80799 München, Germany
2 McLennan Physical Laboratories, University of Toronto, 60 Saint George Street, Toronto, Ontario, M5S 1A7 Canada
We discuss the use of microfabricated magnetic traps, or "chip traps," to study (quasi-)one-dimensional quantum gases. In particular, we discuss the feasibility of studying the Tonks-Girardeau limit, in which the gas is strongly interacting. We review the scaling of the oscillation frequencies of a chip trap, and show that it seems feasible to attain a Tonks-Girardeau parameter as large as 200. The primary difficulty of this approach is detection, since the strongly interacting limit occurs for low densities. We propose a way to "freeze" the distribution, and then measure it with a single-atom detector. This method can also be applied to optical dipole traps.
© EDP Sciences 2004