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

  • Book
  • © 2018

Overview

Authors:
  1. Jacob P. Covey

    1. California Institute of Technology, Pasadena, USA

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  • 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

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (11 chapters)

  1. Front Matter

    Pages i-xvi
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  2. Introduction

    • Jacob P. Covey
    Pages 1-7

  3. Experimental Background and Overview

    • Jacob P. Covey
    Pages 9-30

  4. Quantum-State Controlled Chemical Reactions and Dipolar Collisions

    • Jacob P. Covey
    Pages 31-41

  5. Suppression of Chemical Reactions in a 3D Lattice

    • Jacob P. Covey
    Pages 43-64

  6. Quantum Magnetism with Polar Molecules in a 3D Optical Lattice

    • Jacob P. Covey
    Pages 65-76

  7. A Low-Entropy Quantum Gas of Polar Molecules in a 3D Optical Lattice

    • Jacob P. Covey
    Pages 77-113

  8. The New Apparatus: Enhanced Optical and Electric Manipulation of Ultracold Polar Molecules

    • Jacob P. Covey
    Pages 115-141

  9. Designing, Building, and Testing the New Apparatus

    • Jacob P. Covey
    Pages 143-190

  10. Experimental Procedure: Making Molecules in the New Apparatus

    • Jacob P. Covey
    Pages 191-217

  11. New Physics with the New Apparatus: High Resolution Optical Detection and Large, Stable Electric Fields

    • Jacob P. Covey
    Pages 219-230

  12. Outlook

    • Jacob P. Covey
    Pages 231-245

  13. Back Matter

    Pages 247-249
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Keywords

About this book

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.

Authors and Affiliations

  • California Institute of Technology, Pasadena, USA

    Jacob P. Covey

About the author

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. 

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