Dynamic manipulation of ultra cold atoms using spatially controlled optical potentials

Smith, Aaron (2023). Dynamic manipulation of ultra cold atoms using spatially controlled optical potentials. University of Birmingham. Ph.D.

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Abstract

In this thesis I present my work on the manipulation of atomic Bose-Einstein condensates using optical dipole potentials that are shaped and controlled with a digital micromirror device. I provide an overview of the experimental apparatus used, high- lighting the components that I have added during my thesis work. In particular, I concentrate on the implementation of a superluminescent diode as a source to create optical potentials. I show that, in comparison to lasers, this kind of diodes deliver higher fidelity and higher quality optical patterns when used in combination with a digital micromirror device. I also demonstrate, for the first time, that the resulting optical potentials can be used to shape and dynamically manipulate ultracold atomic gases. Further exploiting the capabilities of the digital micromirror device, I report on the successful implementation of a long synthetic dimension along harmonic trapped states. I show that by suitably manipulating the atomic cloud with well-controlled spatial and temporal optical potential patterns, it is possible to drive Bloch oscillations along this synthetic dimension. I provide an extensive characterisation of the Bloch oscillations for a range of parameters, including laser power and detuning, and I compare the experimental results with the theoretical predictions.

Type of Work:

Thesis (Doctorates > Ph.D.)

Award Type:

Doctorates > Ph.D.

Supervisor(s):