Asymmetric Structures in Systems of Non-equilibrium Bose-Einstein Condensates PDF Download
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Author: Alexander Johnston
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Alexander Johnston
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Dylan James Brown
Publisher:
ISBN:
Category : Bose-Einstein condensation
Languages : en
Pages : 154
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This thesis presents experiments performed to investigate the non-equilibrium dynamics of ultracold bosons. In depth understanding of the behaviour of quantum systems when taken out of equilibrium is of particular interest, especially for the production of quantum computers where thermal effects cause undesirable behaviours. We present our experiments on the thermalization of a87Rb Bose-Einstein condensate taken out of equilibrium by a partial Bragg pulse. We measure the rate of thermalization of the system and measure the temperature of the thermalized state, and compare to numerical simulations. We observe the formation of grey solitons in the thermalized state consistent with the Kibble-Zurek mechanism. We also present experiments on artificial gauge potentials with Bose-Einstein condensates. We benchmark the experiments with a uniform synthetic potential and extend to spin-orbit coupled systems. We take the spin-orbit coupled BEC out of equilibrium through the application of a synthetic electric field and measure the thermalization process of the system. We measure the rate at which the system reaches equilibrium as a function of the final Raman coupling strength, and measure the temperature of the thermalized states. We observe the system thermalize into a spin-orbit coupled state with a the final temperature decreasing with increasing Raman coupling.
Author: Uttam Man Shrestha
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
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Author: Svi︠a︡toslav Anatolʹevich Moskalenko
Publisher: Cambridge University Press
ISBN: 9780521580991
Category : Science
Languages : en
Pages : 434
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Bose-Einstein condensation of excitons is a unique effect in which the electronic states of a solid can self-organize to acquire quantum phase coherence. The phenomenon is closely linked to Bose-Einstein condensation in other systems such as liquid helium and laser-cooled atomic gases. This is the first book to provide a comprehensive survey of this field, covering theoretical aspects as well as recent experimental work. After setting out the relevant basic physics of excitons, the authors discuss exciton-phonon interactions as well as the behaviour of biexcitons. They cover exciton phase transitions and give particular attention to nonlinear optical effects including the optical Stark effect and chaos in excitonic systems. The thermodynamics of equilibrium, quasi-equilibrium, and nonequilibrium systems are examined in detail. The authors interweave theoretical and experimental results throughout the book, and it will be of great interest to graduate students and researchers in semiconductor and superconductor physics, quantum optics, and atomic physics.
Author: Nathan Welch
Publisher:
ISBN:
Category : Bose-Einstein condensation
Languages : en
Pages : 0
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Author: Nick P. Proukakis
Publisher: Cambridge University Press
ISBN: 1108138624
Category : Science
Languages : en
Pages : 663
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Following an explosion of research on Bose–Einstein condensation (BEC) ignited by demonstration of the effect by 2001 Nobel prize winners Cornell, Wieman and Ketterle, this book surveys the field of BEC studies. Written by experts in the field, it focuses on Bose–Einstein condensation as a universal phenomenon, covering topics such as cold atoms, magnetic and optical condensates in solids, liquid helium and field theory. Summarising general theoretical concepts and the research to date - including novel experimental realisations in previously inaccessible systems and their theoretical interpretation - it is an excellent resource for researchers and students in theoretical and experimental physics who wish to learn of the general themes of BEC in different subfields.
Author: Jörg Kärger
Publisher: Leipziger Universitätsverlag
ISBN: 9783865830739
Category :
Languages : en
Pages : 634
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Author: Marziale Milani
Publisher: Springer Nature
ISBN: 3031269497
Category : Medical
Languages : en
Pages : 242
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This interdisciplinary work deals with the bacterial degradation of organic and inorganic materials such as prosthetic devices and the consequent production of non-engineered nanoparticles (NPs). Focus is put on the interaction of these, often toxic, NPs with the environment, the microorganisms and the host human body. Electron Microscopy is the method of choice to investigate bacterial colonization and degradation of plastic polymers. Hence one section of the book is fully dedicated to the most recent and interesting microscopy technologies in microbiology and soft matters. The final chapter of the book on the complex and multivariate relationships between a microscopist and electron microscopy images is dedicated to Lyubov Vasilievna Didenko (1958 – 2015), a passionate researcher who contributed substantially to the field of Electron Microscopy research and its applications in studying bacterial-polymer interactions. The book addresses researchers and advanced students working in general and clinical microbiology, nanobiology, materials sciences and image analysis fields.
Author: Maren Elizabeth Mossman
Publisher:
ISBN:
Category :
Languages : en
Pages : 242
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Dilute gas Bose-Einstein condensates are ultracold quantum gases that display many peculiar hydrodynamic properties, such as superfluidity, i.e. dissipation-less flow, a variety of solitonic textures and quantized vortex structures. Small amplitude excitations within a Bose-Einstein condensate are described by the Bogoliubov dispersion, and have been extensively studied in the past. This dissertation extends previous studies by focusing on strong, nonlinear excitations and shock structures generated in elongated Rb-87 Bose-Einstein condensates, elucidating novel dynamics in these quantum systems.This dissertation is separated into two major parts. In the first part, the building and characterization of a new Bose-Einstein condensate apparatus at Washington State University is described. This apparatus has been built to generate ultracold clouds of Rb-87 and, more recently, K-41atoms. A description of the setups for both isotopes are provided. The apparatus reliably produces Bose-Einstein condensates of 7 x 105 Rb-87 atoms every 20 seconds.In the second part of this dissertation, three experiments in a channel geometry are described that have been conducted with the new apparatus. In this part of the dissertation, quantum hydrodynamic properties are probed by using time-dependent optical potentials to generate nonlinear excitations and shock structures in an elongated Bose-Einstein condensate. An emergence of viscous-like shock dynamics, unidirectionality of a non-magnetic spin switch device, and the structure of dispersive shock waves in new types of higher order dispersions are observed. The work described in this dissertation establishes a novel platform for studying strong nonlinear effects in ultracold quantum gases.
Author: Igor Yevgeniiovich Shvarchuck
Publisher:
ISBN: 9789077209011
Category :
Languages : en
Pages : 96
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