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Record Nr. |
UNINA9910300560303321 |
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Autore |
Covey Jacob P |
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Titolo |
Enhanced Optical and Electric Manipulation of a Quantum Gas of KRb Molecules [[electronic resource] /] / by Jacob P. Covey |
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Pubbl/distr/stampa |
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Cham : , : Springer International Publishing : , : Imprint : Springer, , 2018 |
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ISBN |
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Edizione |
[1st ed. 2018.] |
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Descrizione fisica |
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1 online resource (257 pages) |
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Collana |
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Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5053 |
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Disciplina |
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Soggetti |
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Phase transformations (Statistical physics) |
Condensed materials |
Atoms |
Physics |
Low temperature physics |
Low temperatures |
Quantum Gases and Condensates |
Atoms and Molecules in Strong Fields, Laser Matter Interaction |
Low Temperature Physics |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di contenuto |
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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. |
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Sommario/riassunto |
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This thesis describes significant advances in experimental capabilities |
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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. |
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