Output coupling of a Bose-Einstein condensate formed in a TOP trap

TL;DR

This paper explores two methods for transferring a Bose-Einstein condensate of rubidium-87 into multiple magnetic sub-states, enabling controlled output coupling and atom laser formation within a TOP trap.

Contribution

It introduces and compares two novel output coupling schemes for BECs in a TOP trap, enhancing control over condensate state populations and atom laser generation.

Findings

RF technique enables controllable transfer to specific mF states

Majorana spin flips produce an equal population of all mF states

Output coupling schemes successfully generate atom lasers

Abstract

Two distinct mechanisms are investigated for transferring a pure 87Rb Bose-Einstein condensate in the F = 2, mF = 2 state into a mixture of condensates in all the mF states within the F = 2 manifold. Some of these condensates remain trapped whilst others are output coupled in the form of an elementary pulsed atom laser. Here we present details of the condensate preparation and results of the two condensate output coupling schemes. The first scheme is a radio frequency technique which allows controllable transfer into available mF states, and the second makes use of Majorana spin flips to equally populate all the manifold sub-states.