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

The Nile on eBay Enhanced Optical and Electric Manipulation of a Quantum Gas of KRb Molecules by Jacob P. Covey 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. FORMATPaperback LANGUAGEEnglish CONDITION

Brand New Back Cover 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. Author Biography 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. Table of Contents 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. Long Description 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. Feature Nominated as an outstanding PhD thesis by JILA and the University of Colorado, Boulder. Opens up new horizons in the experimental use of ultracold polar molecules Describes groundbreaking observations of many-body spin dynamics and quantum magnetism with ultracold molecules Describes the design and implementation of a new apparatus for controlling polar molecules which enables a significantly higher yield than the previous apparatus Details ISBN3030074528 Language English Year 2019 ISBN-10 3030074528 ISBN-13 9783030074524 Format Paperback Author Jacob P. Covey Series Springer Theses DEWEY 536.56 Imprint Springer Nature Switzerland AG Place of Publication Cham Country of Publication Switzerland Pages 249 Publication Date 2019-01-19 UK Release Date 2019-01-19 Publisher Springer Nature Switzerland AG Alternative 9783319981062 Audience Professional & Vocational Illustrations 142 Illustrations, color; 6 Illustrations, black and white; XVI, 249 p. 148 illus., 142 illus. in color. Edition Description Softcover Reprint of the Original 1st 2018 ed. We've got thisAt The Nile, if you're looking for it, we've got it.With fast shipping, low prices, friendly service and well over a million items - you're bound to find what you want, at a price you'll love! TheNile_Item_ID:126624232;