Bose polarons and rotating gases in an ultracold Bose-Fermi gas mixture of 40K and 87Rb atoms
Author | |
Abstract |
<p>An ultracold Bose-Fermi gas mixture of <sup>40</sup>K and <sup>87</sup>Rb atoms has tunable interspecies interactions\ <span style="line-height: 1.6em;">and therefore provides a fantastic platform for exploring not only few-body physics such\ </span><span style="line-height: 1.6em;">as Feshbach molecule formation and Efimov trimers, but also many-body physics including Bose\ </span><span style="line-height: 1.6em;">polarons, quantum Hall physics and so on. In this thesis, I present experimental evidence of Bose\ </span><span style="line-height: 1.6em;">polarons in cold atoms obtained using radio-frequency spectroscopy to measure the excitation spectrum\ </span><span style="line-height: 1.6em;">of fermionic <sup>40</sup>K impurities resonantly interacting with a BEC of <sup>87</sup>Rb atoms. These Bose\ </span><span style="line-height: 1.6em;">polarons originate from the dressing of an impurity coupled to its environment, which is an important\ </span><span style="line-height: 1.6em;">paradigm in quantum many-body physics. I also present initial work that launches an\ </span><span style="line-height: 1.6em;">exciting new direction for our experiment, which is exploring rotating quantum gases. Goals for\ </span><span style="line-height: 1.6em;">this work include studying both rotating Bose and Fermi super</span><span style="line-height: 1.6em;">fluids with tunable interactions as\ </span><span style="line-height: 1.6em;">well as working toward rapidly rotating quantum gases in the quantum Hall regime. For these\ </span><span style="line-height: 1.6em;">goals, a new all-optical trap for rotating gases was designed, implemented, and tested using a <sup>87</sup>Rb\ </span><span style="line-height: 1.6em;">Bose-Einstein condensate.</span></p>
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Year of Publication |
2016
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Degree |
Ph.D.
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Number of Pages |
120
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Date Published |
08-2016
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University |
University of Colorado Boulder
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City |
Boulder, CO
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JILA PI Advisors | |
M-G Hu_thesis.pdf16.03 MB
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Publication Status |