Honours seminars, Sem. 1 2016


These seminars will be held 3 pm–4pm , 27th May, in Frank White 43-102.

Jamie Feiss
Tuesday May 24th – Prentice 42-115:
3.00pm-3.25pm – Jamie Feiss
Title: Spin squeezing via two-axis twisting for enhanced atom interferometry
Supervisors: Simon Haine and Stuart Szigeti

In this thesis we apply a previously proposed two-axis twisting scheme to the multi-mode regime for a two-component Bose-Einstein condensate. We also propose a new pulsing scheme which allows for squeezing of Rubidium-87 to achieve enhanced atom interferometry, which could potentially be applicable to experimental interferometry.

Emily Kahl
Title: Benchmark photon-helium scattering cross-sections
Supervisor: Michael Bromley

Photon-atom scattering plays a key role in physical systems from large-scale astrophysical processes to ultra-high precision atomic clocks. In this talk, I will present a complete picture of single-photon scattering processes in atomic helium derived from large-scale atomic structure calculations. These results dramatically improve upon the accuracy of previously published works.

Alexander Pritchard
Title: Two-photon Bragg scattering of Bose-Einstein condensates
Supervisor: Mark Baker

Two-photon Bragg scattering is a powerful technique where we use a standing light wave to select momentum states from our Bose-Einstein condensate (BEC) and transfer precise energy and momentum to these ultra-cold atoms. This can be used to study the properties of a BEC. Bragg scattering can also be used as a beam-splitter or mirror for BECs and with this we can perform matter-wave interferometry.Bragg spectroscopy provides a high momentum and energy resolution allowing us to measure the mean field energy and the intrinsic momentum uncertainty of the condensate. I will present details of my work in developing Bragg capability for the BEC apparatus at UQ, and its first application in the study of condensates in novel time-averaged optical traps.