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The preparation of topological modes...

Williams, James Edgar.

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The preparation of topological modes in a strongly-coupled two-component Bose-Einstein condensate.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The preparation of topological modes in a strongly-coupled two-component Bose-Einstein condensate./
作者:	Williams, James Edgar.
面頁冊數:	234 p.
附註:	Source: Dissertation Abstracts International, Volume: 60-12, Section: B, page: 6148.
Contained By:	Dissertation Abstracts International60-12B.
標題:	Physics, General. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9955332
ISBN:	0599583991

The preparation of topological modes in a strongly-coupled two-component Bose-Einstein condensate.
Williams, James Edgar.

The preparation of topological modes in a strongly-coupled two-component Bose-Einstein condensate. - 234 p.

Source: Dissertation Abstracts International, Volume: 60-12, Section: B, page: 6148.

Thesis (Ph.D.)--University of Colorado at Boulder, 1999.

In this thesis, we present a detailed theoretical study of a coupled two-component Bose-Einstein condensate in a magnetic trap. We first present a quantum kinetic theory describing the Bose-condensed gas, that applies to general finite-temperature and nonequilibrium situations. We then treat the coupled, two-component condensate at zero-temperature by solving the Gross-Pitaevskii equation, in which the fluctuations are neglected. We show that in the weak-coupling limit, the system behaves like a nonlinear Josephson-junction, analogous to two condensates in a double-well potential that are coupled due to quantum tunneling. In the opposite limit of strong coupling between internal states, we show that the condensate can be prepared in a variety of new topological states. In particular, we predict a scheme for generating a quantized vortex in this two-component system, where one component sits in the center with a uniform phase while the other circulates around it. Subsequent related experimental work at JILA by the group of Eric Cornell and Carl Wieman has demonstrated these predictions in the laboratory---this is the first observation of a vortex in a dilute-gas Bose-Einstein condensate. Finally, we study the kinetic evolution of a single-component gas above the critical temperature by solving the Boltzmann equation and investigate the possibility of achieving a steady-state condensation, which can occur if atoms are injected into the trap during evaporative cooling.

ISBN: 0599583991Subjects--Topical Terms:

1018488
Physics, General.

The preparation of topological modes in a strongly-coupled two-component Bose-Einstein condensate.
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245 1 4 $a The preparation of topological modes in a strongly-coupled two-component Bose-Einstein condensate.
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500 $a Director: Murray Holland.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 1999.
520 $a In this thesis, we present a detailed theoretical study of a coupled two-component Bose-Einstein condensate in a magnetic trap. We first present a quantum kinetic theory describing the Bose-condensed gas, that applies to general finite-temperature and nonequilibrium situations. We then treat the coupled, two-component condensate at zero-temperature by solving the Gross-Pitaevskii equation, in which the fluctuations are neglected. We show that in the weak-coupling limit, the system behaves like a nonlinear Josephson-junction, analogous to two condensates in a double-well potential that are coupled due to quantum tunneling. In the opposite limit of strong coupling between internal states, we show that the condensate can be prepared in a variety of new topological states. In particular, we predict a scheme for generating a quantized vortex in this two-component system, where one component sits in the center with a uniform phase while the other circulates around it. Subsequent related experimental work at JILA by the group of Eric Cornell and Carl Wieman has demonstrated these predictions in the laboratory---this is the first observation of a vortex in a dilute-gas Bose-Einstein condensate. Finally, we study the kinetic evolution of a single-component gas above the critical temperature by solving the Boltzmann equation and investigate the possibility of achieving a steady-state condensation, which can occur if atoms are injected into the trap during evaporative cooling.
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