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Photoassociation of ultracold CsYb molecules and determination of interspecies scattering lengths

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Photoassociation of ultracold CsYb molecules and determination of interspecies scattering lengths/ by Alexander Guttridge.
作者:	Guttridge, Alexander.
出版者:	Cham :Springer International Publishing : : 2019.,
面頁冊數:	xv, 196 p. :ill., digital ; : 24 cm.;
Contained By:	Springer eBooks
標題:	Low temperatures. -
電子資源:	https://doi.org/10.1007/978-3-030-21201-8
ISBN:	9783030212018

Photoassociation of ultracold CsYb molecules and determination of interspecies scattering lengths
Guttridge, Alexander.

Photoassociation of ultracold CsYb molecules and determination of interspecies scattering lengths[electronic resource] /by Alexander Guttridge. - Cham :Springer International Publishing :2019. - xv, 196 p. :ill., digital ;24 cm. - Springer theses,2190-5053. - Springer theses..

Introduction -- Routes to Ground State CsYb Molecules -- Experimental Setup -- Quantum Degenerate Gases of Yb -- A Quantum Degenerate Gas of Cs -- Thermalisation in an ultracold mixture of Cs and Yb -- One-Photon Photoassociation -- Two-Photon Photoassociation -- Conclusions and Outlook -- Bibliography.

This thesis lays the groundwork for producing a new class of ultracold molecule by associating an alkali-metal atom and a closed-shell alkaline-earth-like atom, specifically Cs and Yb. Such molecules exhibit both a magnetic dipole moment and an electric dipole moment in their ground state. This extra degree of freedom opens up new avenues of research including the study of exotic states of matter, the shielding of molecular collisions and the simulation of lattice spin models. In detail, the thesis reports the first and only ultracold mixture of Cs and Yb in the world, giving details of the methods used to cool such contrasting atomic species together. Using sensitive two-colour photoassociation measurements to measure the binding energies of the near-threshold CsYb molecular levels in the electronic ground state has allowed the previously unknown scattering lengths to be accurately determined for all the Cs-Yb isotopic combinations. As part of this work, the one-photon photoassociation of ultracold Cs*Yb is also studied, yielding useful information on the excited-state potential. Knowledge of the scattering lengths enables a strategy to be devised to cool both species to quantum degeneracy and, crucially, determines the positions of interspecies Feshbach resonances required for efficient association of ground-state CsYb molecules. With these results, the prospect of bringing a new molecule into the ultracold regime has become considerably closer.

ISBN: 9783030212018

Standard No.: 10.1007/978-3-030-21201-8doiSubjects--Topical Terms:

639781
Low temperatures.

LC Class. No.: QC173.25 / .G888 2019

Dewey Class. No.: 539.7

Photoassociation of ultracold CsYb molecules and determination of interspecies scattering lengths
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520 $a This thesis lays the groundwork for producing a new class of ultracold molecule by associating an alkali-metal atom and a closed-shell alkaline-earth-like atom, specifically Cs and Yb. Such molecules exhibit both a magnetic dipole moment and an electric dipole moment in their ground state. This extra degree of freedom opens up new avenues of research including the study of exotic states of matter, the shielding of molecular collisions and the simulation of lattice spin models. In detail, the thesis reports the first and only ultracold mixture of Cs and Yb in the world, giving details of the methods used to cool such contrasting atomic species together. Using sensitive two-colour photoassociation measurements to measure the binding energies of the near-threshold CsYb molecular levels in the electronic ground state has allowed the previously unknown scattering lengths to be accurately determined for all the Cs-Yb isotopic combinations. As part of this work, the one-photon photoassociation of ultracold Cs*Yb is also studied, yielding useful information on the excited-state potential. Knowledge of the scattering lengths enables a strategy to be devised to cool both species to quantum degeneracy and, crucially, determines the positions of interspecies Feshbach resonances required for efficient association of ground-state CsYb molecules. With these results, the prospect of bringing a new molecule into the ultracold regime has become considerably closer.
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