Tunable axial potentials for atom chip waveguides

TL;DR

This paper introduces a method to generate tunable axial magnetic potentials on atom chips, enabling precise control of atom waveguides for various trapping configurations, demonstrated through a fabricated double well setup.

Contribution

The paper presents a novel chip design that allows adjustable axial potentials using a single wire configuration, simplifying the creation of complex trapping geometries.

Findings

Successfully designed and fabricated a chip with tunable axial potentials.

Demonstrated a double well potential using the chip.

Enabled suppression of higher order terms for precise trapping.

Abstract

We present a method for generating precise magnetic potentials that can be described by a polynomial series along the axis of a cold atom waveguide near the surface of an atom chip. With a single chip design consisting of several wire pairs, various axial potentials can be created by varying the ratio of the currents in the wires, including double wells, triple wells, and pure harmonic traps with suppression of higher order terms. We use this method to design and fabricate a chip with modest experimental requirements. Finally, we use the chip to demonstrate a double well potential.