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Zawartość zarchiwizowana w dniu 2024-05-14

Dynamical processes in vapours of bose-einstein condensed atoms


Research objectives and content
We propose to study theoretically the dynamical properties of Bose-Einstein condensed dilute vapours of atomic systems, and in particular we shall focus on collective behaviour, allowing for the effects of the mean field generated by inter- actions between atoms, and for collisions between atoms. As a first step in our study, we will consider the normal (non-condensed) phase in the collisionless regime. Next we plan to explore the regime in-between the collisionless one and the hydrodynamic (which we have recently studied); this is the most realistic calculation, since all the experiments that have been done up to now are in this intermediate regime. After understanding the damping mechanisms in the normal phase, we plan to study the condensed phase; even there the normal component of the gas is expected to provide the observed damping. The other major project we propose to attack, is non-linear effects, recently explored experimentally. We plan to continue a study we have already started, investigating shock-wave formation and the existence of solitary waves in these condensed atomic systems. Apart from the scientific interest of this project, its possible technological ap- plications (e.g.1 atom lithography, construction of atomic lasers, non-dissipative transport of energy with use of the superfluid property of condensates) make this study very promising. Training content (objective, benefit and expected impact)
Combined knowledge from the areas of low-temperature physics, quantum optics, non-linear dynamics, atomic physics, theory of quantum liquids, quantum-field the- oretical techniques, and statistical physics. Links with industry / industrial relevance (22)

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17,Blegdamsvej 17

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