Enhanced Optical and Electric Manipulation of a Quantum Gas of KRb Molecules

Jacob P. Covey (Autor)

Buch | Hardcover

XVI, 249 Seiten

2018 | 1st ed. 2018
Springer International Publishing (Verlag)
978-3-319-98106-2 (ISBN)

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This thesis describes significant advances in experimental capabilities using ultracold polar molecules. While ultracold polar molecules are an idyllic platform for quantum chemistry and quantum many-body physics, molecular samples prior to this work failed to be quantum degenerate, were plagued by chemical reactions, and lacked any evidence of many-body physics. These limitations were overcome by loading molecules into an optical lattice to control and eliminate collisions and hence chemical reactions. This led to observations of many-body spin dynamics using rotational states as a pseudo-spin, and the realization of quantum magnetism with long-range interactions and strong many-body correlations.
Further, a 'quantum synthesis' technique based on atomic insulators allowed the author to increase the filling fraction of the molecules in the lattice to 30%, a substantial advance which corresponds to an entropy-per-molecule entering the quantum degenerate regime and surpasses the so-called percolations threshold where long-range spin propagation is expected.
Lastly, this work describes the design, construction, testing, and implementation of a novel apparatus for controlling polar molecules. It provides access to: high-resolution molecular detection and addressing; large, versatile static electric fields; and microwave-frequency electric fields for driving rotational transitions with arbitrary polarization. Further, the yield of molecules in this apparatus has been demonstrated to exceed 10^5, which is a substantial improvement beyond the prior apparatus, and an excellent starting condition for direct evaporative cooling to quantum degeneracy.

Jacob Covey received his PhD in 2017 for research undertaken at JILA, the University of Colorado, Boulder, and NIST. He holds a postdoctoral research position at Caltech.

Chapter1. Introduction.- Chapter2. Experimental Background and Overview.- Chapter 3. Quantum-State Controlled Chemical Reactions and Dipolar Collisions.- Chapter 4. Suppression of Chemical Reactions in a 3D Lattice.- Chapter 5. Quantum Magnetism with Polar Molecules in a 3D Optical Lattice.- Chapter 6. A Low Entropy Quantum Gas of Polar Molecules in a 3D Optical Lattice.- Chapter 7. The New Apparatus - Enhanced Optical and Electric Manipulation of Ultracold Polar Molecules.- Chapter 8. Designing, Building and Testing the New Apparatus.- Chapter 9. Experimental Procedure - Making Molecules in the New Apparatus.- Chapter 10. New Physics with the New Apparatus - High Resolution Optical Detection and Large, Stable Electric Fields.- Chapter 11. Outlook.

Erscheinungsdatum	28.09.2018
Reihe/Serie	Springer Theses
Zusatzinfo	XVI, 249 p. 148 illus., 142 illus. in color.
Verlagsort	Cham
Sprache	englisch
Maße	155 x 235 mm
Gewicht	559 g
Themenwelt	Naturwissenschaften ► Physik / Astronomie ► Atom- / Kern- / Molekularphysik
	Naturwissenschaften ► Physik / Astronomie ► Plasmaphysik
	Naturwissenschaften ► Physik / Astronomie ► Quantenphysik
	Naturwissenschaften ► Physik / Astronomie ► Theoretische Physik
	Naturwissenschaften ► Physik / Astronomie ► Thermodynamik
Schlagworte	highly-filled 3D optical lattice • low entropy quantum gas polar molecules • many-body spin dynamics ultracold polar molecules • new apparatus controlling polar molecules • quantum degenerate bulk gas • quantum degenerate bulk gas polar molecules • quantum magnetism polar molecules • quantum-state controlled chemical reaction • quantum synthesis atomic insulator • ultracold polar molecule experiment
ISBN-10	3-319-98106-4 / 3319981064
ISBN-13	978-3-319-98106-2 / 9783319981062
Zustand	Neuware