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Vortex Formation by Merging and Interference of Multiple Trapped Bose-Einstein Condensates

2007
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Release : 2007
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Book Synopsis Vortex Formation by Merging and Interference of Multiple Trapped Bose-Einstein Condensates by : David Rene Scherer

Download or read book Vortex Formation by Merging and Interference of Multiple Trapped Bose-Einstein Condensates written by David Rene Scherer. This book was released on 2007. Available in PDF, EPUB and Kindle. Book excerpt: An apparatus for producing atomic-gas Bose-Einstein condensates (BECs) of 87-Rb atoms is described. The apparatus produces 87-Rb BECs in a dual-chamber vacuumsystem that incorporates magnetic transport of trapped atoms from the magneto-optical trapping cell to the BEC production cell via the operation of a series of overlapping magnet coils. The design, construction, and operation of the apparatus are described in detail. The apparatus is used to study the creation of quantized vortices in BECs by the merging and interference of multiple trapped condensates. In this experiment, a single harmonic potential well is partitioned into three sections by an optical barrier, enabling the simultaneous formation of three independent, uncorrelated BECs. The BECs may either merge together during their growth, or, for high-energy barriers, the BECs can be merged together by barrier removal after their formation. Either process may instigate vortex formation in the resulting BEC, depending on the initially indeterminate relative phases of the condensates and the merging rate.

Quantised Vortices

2019-08-05 Science
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Release : 2019-08-05
Genre : Science
Kind : eBook
Book Rating : 261/5 ( reviews)

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Book Synopsis Quantised Vortices by : Tapio Simula

Download or read book Quantised Vortices written by Tapio Simula. This book was released on 2019-08-05. Available in PDF, EPUB and Kindle. Book excerpt: Vortices comprising swirling motion of matter are observable in classical systems at all scales ranging from atomic size to the scale of galaxies. In quantum mechanical systems, such vortices are robust entities whose behaviours are governed by the strict rules of topology. The physics of quantum vortices is pivotal to basic science of quantum turbulence and high temperature superconductors, and underpins emerging quantum technologies including topological quantum computation. This handbook is aimed at providing a dictionary style portal to the fascinating quantum world of vortices.

Novel Superfluids

2013-02-28 Science
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Release : 2013-02-28
Genre : Science
Kind : eBook
Book Rating : 196/5 ( reviews)

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Book Synopsis Novel Superfluids by : Karl-Heinz Bennemann

Download or read book Novel Superfluids written by Karl-Heinz Bennemann. This book was released on 2013-02-28. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on the latest developments in the field of Superfluidity. The phenomenon has had a tremendous impact on the fundamental sciences as well as a host of technologies. It began with the discovery of superconductivity in mercury in 1911, which was ultimately described theoretically by the theory of Bardeen Cooper and Schriever (BCS) in 1957. The analogous phenomena, superfluidity, was discovered in helium in 1938 and tentatively explained shortly thereafter as arising from a Bose-Einstein Condensation (BEC) by London. But the importance of superfluidity, and the range of systems in which it occurs, has grown enormously. In addition to metals and the helium liquids the phenomena has now been observed for photons in cavities, excitons in semiconductors, magnons in certain materials, and cold gasses trapped in high vacuum. It very likely exist for neutrons in a neutron star and, possibly, in a conjectured quark state at their center. Even the Universe itself can be regarded as being in a kind of superfluid state. All these topics are discussed by experts in the respective subfields.

Vortices in Bose-Einstein Condensates

2007-10-14 Mathematics
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Release : 2007-10-14
Genre : Mathematics
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Book Rating : 92X/5 ( reviews)

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Book Synopsis Vortices in Bose-Einstein Condensates by : Amandine Aftalion

Download or read book Vortices in Bose-Einstein Condensates written by Amandine Aftalion. This book was released on 2007-10-14. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date approach to the diagnosis and management of endocarditis based on a critical analysis of the recent studies. It is the only up-to-date clinically oriented textbook available on this subject. The book is structured in a format that is easy to follow, clinically relevant and evidence based. The author has a special interest in the application of ultrasound in the study of cardiac structure and function.

Applied Research of Quantum Information Based on Linear Optics

2016-03-31 Science
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Release : 2016-03-31
Genre : Science
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Book Rating : 049/5 ( reviews)

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Book Synopsis Applied Research of Quantum Information Based on Linear Optics by : Xiaoye Xu

Download or read book Applied Research of Quantum Information Based on Linear Optics written by Xiaoye Xu. This book was released on 2016-03-31. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on outstanding work in two main subfields of quantum information science: one involves the quantum measurement problem, and the other concerns quantum simulation. The thesis proposes using a polarization-based displaced Sagnac-type interferometer to achieve partial collapse measurement and its reversal, and presents the first experimental verification of the nonlocality of the partial collapse measurement and its reversal. All of the experiments are carried out in the linear optical system, one of the earliest experimental systems to employ quantum communication and quantum information processing. The thesis argues that quantum measurement can yield quantum entanglement recovery, which is demonstrated by using the frequency freedom to simulate the environment. Based on the weak measurement theory, the author proposes that white light can be used to precisely estimate phase, and effectively demonstrates that the imaginary part of the weak value can be introduced by means of weak measurement evolution. Lastly, a nine-order polarization-based displaced Sagnac-type interferometer employing bulk optics is constructed to perform quantum simulation of the Landau-Zener evolution, and by tuning the system Hamiltonian, the first experiment to research the Kibble-Zurek mechanism in non-equilibrium kinetics processes is carried out in the linear optical system.

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