0000000000276395

AUTHOR

L. Tracewski

showing 3 related works from this author

Free-fall expansion of finite-temperature Bose-Einstein condensed gas in the non Thomas-Fermi regime

2008

We report on our study of the free-fall expansion of a finite-temperature Bose-Einstein condensed cloud of 87Rb. The experiments are performed with a variable total number of atoms while keeping constant the number of atoms in the condensate. The results provide evidence that the BEC dynamics depends on the interaction with thermal fraction. In particular, they provide experimental evidence that thermal cloud compresses the condensate.

PhysicsCondensed Matter::Quantum GasesCondensed matter physicsCondensed Matter::OtherFOS: Physical sciencesFraction (chemistry)Condensed Matter PhysicsAtomic and Molecular Physics and Opticslaw.inventionCondensed Matter - Other Condensed MatterlawThermalConstant (mathematics)Bose–Einstein condensateOther Condensed Matter (cond-mat.other)Fermi Gamma-ray Space TelescopeVariable (mathematics)
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Production and study of spinor condensates of <sup>87</sup>Rb released from a magnetic trap

2009

We report on our study of spinor condensates in the F=2 state of 87Rb produced in an atomic cloud expanding after releasing from a magnetic trap. The experiments are conducted in the setup described in Ref. [1].

Condensed Matter::Quantum GasesPhysicsSpinorMagnetic momentMagnetic domainMagnetic separationchemistry.chemical_elementMagnetic perturbationRubidiumchemistryMagnetic trapAtom opticsPhysics::Atomic PhysicsAtomic physicsCLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference
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Analysis and calibration of absorptive images of Bose-Einstein condensate at non-zero temperatures

2008

We describe the method allowing quantitative interpretation of absorptive images of mixtures of BEC and thermal atoms which reduces possible systematic errors associated with evaluation of the contribution of each fraction. By using known temperature dependence of the BEC fraction, the analysis allows precise calibration of the fitting results. The developed method is verified in two different measurements and compares well with theoretical calculations and with measurements performed by another group.

PhysicsSystematic errorCondensed Matter::Quantum GasesZero (complex analysis)FOS: Physical sciencesInterpretation (model theory)Computational physicslaw.inventionCondensed Matter - Other Condensed MatterlawThermalCalibrationFraction (mathematics)InstrumentationBose–Einstein condensateOther Condensed Matter (cond-mat.other)
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