Ultracold Atoms for Foundational Tests of Quantum Mechanics

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Springer, Jun 25, 2016 - Science - 156 pages

This thesis presents a theoretical investigation into the creation and exploitation of quantum correlations and entanglement among ultracold atoms. Specifically, it focuses on these non-classical effects in two contexts: (i) tests of local realism with massive particles, e.g., violations of a Bell inequality and the EPR paradox, and (ii) realization of quantum technology by exploitation of entanglement, for example quantum-enhanced metrology. In particular, the work presented in this thesis emphasizes the possibility of demonstrating and characterizing entanglement in realistic experiments, beyond the simple “toy-models” often discussed in the literature. The importance and relevance of this thesis are reflected in a spate of recent publications regarding experimental demonstrations of the atomic Hong-Ou-Mandel effect, observation of EPR entanglement with massive particles and a demonstration of an atomic SU(1,1) interferometer. With a separate chapter on each of these systems, this thesis is at the forefront of current research in ultracold atomic physics.
 

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Contents

1 Introduction and Background Physics
1
2 Proposal for Demonstrating the HongOuMandel Effect with Matter Waves
45
3 Proposal for a MotionalState Bell Inequality Test with Ultracold Atoms
56
4 Sensitivity to Thermal Noise of Atomic EinsteinPodolskyRosen Entanglement
71
5 An Atomic SU1 1 Interferometer via SpinChanging Collisions
82
6 On the Relation of the Particle Number Distribution of Stochastic Wigner Trajectories and Experimental Realizations
95
7 Conclusion
113
Appendix AAnalytic Models of Condensate Collisions
116
Appendix BMeanField Theory of Bragg Scattering
131
Appendix CSupplementary Material for Chapter 2
137
Appendix DSupplementary Material for Chapter 3
147
Appendix ESupplementary Material for Chapter 4
154
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About the author (2016)


Robert Lewis-Swan obtained his Bachelors degree in science from University of Queensland, Australia in 2011 and was consequently awarded a prestigious University Medal. He continued his education at University of Queensland, pursuing a PhD in ultracold atomic physics under the supervision of A/Prof. Karen Kheruntsyan and graduating in 2015. His research interests include the study of non-equilibrium many-body dynamics, specifically the novel physics currently being explored in analogue quantum simulators, along with the generation, characterization and exploitation of entanglement and non-classical correlations in developing quantum technology.

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