A compact single-chamber apparatus for Bose-Einstein condensation of $^87$Rb

TL;DR

This paper presents a simple, compact, and robust single-chamber apparatus for producing high-quality Bose-Einstein condensates of $^87$Rb atoms in under 30 seconds, using off-the-shelf components and versatile trapping methods.

Contribution

The authors develop a compact, single-chamber setup capable of producing Bose-Einstein condensates with multiple trapping techniques, including hybrid and optically plugged traps, using inexpensive laser sources.

Findings

Produced > $3\times 10^5$ atoms in < 30 s

Achieved condensation with as little as 70 mW plug-laser power

Demonstrated condensation in a uniform optical-box potential

Abstract

We describe a simple and compact single-chamber apparatus for robust production of $^87$Rb Bose-Einstein condensates. The apparatus is built from off-the-shelf components and allows production of quasi-pure condensates of > $3\times 10^5$ atoms in < 30 s. This is achieved using a hybrid trap created by a quadrupole magnetic field and a single red-detuned laser beam [Y.-J. Lin et al., Phys. Rev. A 79, 063631 (2009)]. In the same apparatus we also achieve condensation in an optically plugged quadrupole trap [K. B. Davis et al., Phys. Rev. Lett. 75, 3969 (1995)] and show that as little as 70 mW of plug-laser power is sufficient for condensation, making it viable to pursue this approach using inexpensive diode lasers. While very compact, our apparatus features sufficient optical access for complex experiments, and we have recently used it to demonstrate condensation in a uniform optical-box potential [A. Gaunt et al., arXiv:1212.4453 (2012)].