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

Jacob P. Covey
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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.
      Format: Hardback CONTRIBUTORS: Jacob P. Covey EAN: 9783319981062 COUNTRY: Switzerland PAGES: WEIGHT: 571 g HEIGHT: 235 cm
      PUBLISHED BY: Springer International Publishing AG DATE PUBLISHED: 2018-10-11 CITY: GENRE: SCIENCE / Physics / Quantum Theory, SCIENCE / Mechanics / Thermodynamics, SCIENCE / Physics / Atomic & Molecular WIDTH: 155 cm SPINE:

      Book Themes:

      Low temperature physics, Atomic and molecular physics, Quantum physics (quantum mechanics and quantum field theory)

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      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. 
      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.
      Format: Hardback CONTRIBUTORS: Jacob P. Covey EAN: 9783319981062 COUNTRY: Switzerland PAGES: WEIGHT: 571 g HEIGHT: 235 cm
      PUBLISHED BY: Springer International Publishing AG DATE PUBLISHED: 2018-10-11 CITY: GENRE: SCIENCE / Physics / Quantum Theory, SCIENCE / Mechanics / Thermodynamics, SCIENCE / Physics / Atomic & Molecular WIDTH: 155 cm SPINE:

      Book Themes:

      Low temperature physics, Atomic and molecular physics, Quantum physics (quantum mechanics and quantum field theory)

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      Be the first to write a review
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      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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