Using magnetic chip traps to study Tonks-Girardeau quantum gases

TL;DR

This paper explores the potential of microfabricated magnetic chip traps for studying strongly interacting one-dimensional quantum gases, specifically targeting the Tonks-Girardeau regime, and proposes a detection method for low-density gases.

Contribution

It demonstrates the feasibility of achieving high Tonks-Girardeau parameters with chip traps and introduces a novel detection approach for low-density, strongly interacting gases.

Findings

Feasibility of reaching a Tonks-Girardeau parameter of 200 with chip traps.

Proposed a 'freezing' technique for distribution measurement.

Detection method applicable to optical dipole traps.

Abstract

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.