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BL
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| Record Number
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861809
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| Main Entry
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Rauer, Bernhard
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| Title & Author
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Non-equilibrium dynamics beyond dephasing : : recurrences and loss induced cooling in one-dimensional Bose gases /\ Bernhard Rauer.
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| Publication Statement
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Cham :: Springer,, [2019]
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, ©2019
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| Series Statement
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Springer theses
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| Page. NO
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1 online resource :: illustrations (some color)
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| ISBN
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3030182355
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: 3030182363
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: 3030182371
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: 303018238X
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: 9783030182359
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: 9783030182366
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: 9783030182373
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: 9783030182380
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9783030182359
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| Bibliographies/Indexes
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Includes bibliographical references.
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| Contents
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Intro; Supervisor's Foreword; Abstract; Acknowledgements; Contents; 1 Preamble; References; 2 Introduction and Theoretical Basics; 2.1 The Interacting 1d Bose Gas; 2.1.1 Lieb-Liniger Model; 2.1.2 Effective Description for Quasi-condensates; 2.1.3 Coupled Quasi-condensates; 2.2 From 3d to 1d; 2.2.1 Effective 1d Interaction Strength; 2.2.2 Transverse Broadening; 2.2.3 Collisions; 2.3 Numerical Methods; 2.3.1 Discretized Luttinger Liquid; 2.3.2 Gross-Pitaevskii Equation; References; 3 Experimental Setup and Probing; 3.1 Trapping and Cooling Neutral Atoms; 3.1.1 Magnetic Trapping
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3.1.2 Wire Traps3.1.3 Radio-Frequency Dressed State Potentials; 3.1.4 Optical Dipole Potentials; 3.1.5 Evaporative Cooling; 3.2 Experimental Setup; 3.2.1 Overview; 3.2.2 Atom Chip Trap; 3.2.3 Box Trap; 3.3 Probing; 3.3.1 Time-of-Flight Expansion; 3.3.2 Absorption Imaging; 3.3.3 Density Ripple Thermometry; 3.3.4 Relative Phase Measurement; 3.3.5 Contrast Distribution Thermometry; 3.3.6 Balance Measurement; References; 4 Cooling Through Uniform Loss; 4.1 Experimental Observation; 4.2 Outcoupling Process; 4.3 Theoretical Model; 4.3.1 Loss Cooling; 4.3.2 Trap Effects; 4.3.3 Non-thermal States
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4.3.4 Shot Noise Corrections4.4 Discussion; References; 5 Recurrences; 5.1 Dispersion Relation and Rephasing; 5.2 Experimental Implementation; 5.2.1 Measurement Scheme; 5.2.2 Results; 5.2.3 Non-recurring Zero Mode; 5.2.4 Common Density Dynamics; 5.3 Theoretical Description; 5.4 Damping; 5.4.1 Sources; 5.4.2 Theoretical Modeling; 5.4.3 Discussion; 5.5 Harmonic Trap; 5.6 Conclusion; References; 6 Outlook; 6.1 Arbitary 1d Potentials; References; A Transverse Broadening Corrections; B Radial GPE Simulations; C Bootstrap
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| Abstract
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Cold atomic gases trapped and manipulated on atom chips allow the realization of seminal one-dimensional (1d) quantum many-body problems in an isolated and well controlled environment. In this context, this thesis presents an extensive experimental study of non-equilibrium dynamics in 1d Bose gases, with a focus on processes that go beyond simple dephasing dynamics. It reports on the observation of recurrences of coherence in the post-quench dynamics of a pair of 1d Bose gases and presents a detailed study of their decay. The latter represents the first observation of phonon-phonon scattering in these systems. Furthermore, the thesis investigates a novel cooling mechanism occurring in Bose gases subjected to a uniform loss of particles. Together, the results presented show a wide range of non-equilibrium phenomena occurring in 1d Bose gases and establish them as an ideal testbed for many-body physics beyond equilibrium.
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| Subject
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Bose-Einstein gas.
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Many-body problem.
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Nonequilibrium thermodynamics.
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Bose-Einstein gas.
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Many-body problem.
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Nonequilibrium thermodynamics.
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| Subject
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SCIENCE-- Energy.
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SCIENCE-- Mechanics-- General.
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| Subject
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SCIENCE-- Physics-- General.
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| Dewey Classification
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530.14/4
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| LC Classification
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QC174.17.P7
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