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Acta Physica Polonica A

Studies of the Hydrodynamic Properties of Bose-Einstein Condensate of87Rb Atoms in a Magnetic Trap

F. Bylicki, M. Zawada, Wojciech Gawlik, Andrzej Noga, Jerzy Zachorowski, W. Jastrzȩbski, J. Szczepkowski, Marcin Witkowski

Published Feb 1, 2008• 9 citations
Publisher

Abstract

We report details of the apparatus and the experimental procedure leading to production of the Bose-Einstein condensate of 87 Rb atoms.Basic hydrodynamic properties of the condensate, like quadrupole oscillations and free fall expansion, are investigated.They provide also characteristics of the magnetic trap crucial for interpretation of future experiments.

DOI
10.12693/aphyspola.113.691

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We describe an experiment to produce 87{}^{87}87Rb Bose-Einstein condensates in an optically plugged magnetic quadrupole trap, using a blue-detuned laser. Due to the large detuning of the plug laser with respect to the atomic transition, the evaporation has to be carefully optimized in order to efficiently overcome the Majorana losses. We provide a complete theoretical and experimental study of the trapping potential at low temperatures and show that this simple model describes our data well. In particular, we demonstrate methods to reliably measure the trap oscillation frequencies and the bottom frequency, based on periodic excitation of the trapping potential and on radio-frequency spectroscopy, respectively. We show that this hybrid trap can be operated in a well-controlled regime that allows a reliable production of degenerate gases.
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A compact single-chamber apparatus for Bose-Einstein condensation of 87^8787Rb
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