Ultracold quantum matter

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Scissors mode and superfluidity of a trapped Bose-Einstein condensed gas

(2000) 285-289

Authors:

OM Marago, SA Hopkins, J Arlt, E Hodby, G Hechenblaikner, CJ Foot
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Bose-Einstein condensation in a rotating anisotropic TOP trap

Journal of Physics B: Atomic, Molecular and Optical Physics 32:24 (1999) 5861-5869

Authors:

J Arlt, O Maragò, E Hodby, SA Hopkins, G Hechenblaikner, S Webster, CJ Foot

Abstract:

We describe the construction and operation of a time-orbiting potential trap that has different oscillation frequencies along its three principal axes. These axes can be rotated and we have observed Bose-Einstein condensates of 87Rb with a rotating ellipsoidal shape. Under these conditions it has been predicted that quantized vortices form and are stable.
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Bose-Einstein condensation in a rotating anisotropic TOP trap

(1999)

Authors:

J Arlt, O Marago', E Hodby, SA Hopkins, G Hechenblaikner, S Webster, CJ Foot
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Observation of the scissors mode and superfluidity of a trapped Bose-Einstein condensed gas

(1999)

Authors:

OM Marago', SA Hopkins, J Arlt, E Hodby, G Hechenblaikner, CJ Foot
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Limits of the separated-path Ramsey atom interferometer

Journal of Physics B: Atomic, Molecular and Optical Physics 32:20 (1999) 5033-5045

Authors:

RM Godun, CL Webb, PD Featonby, MB D'Arcy, MK Oberthaler, GS Summy, CJ Foot, K Burnett

Abstract:

We describe in detail our caesium atom interferometer which uses a combination of microwaves and momentum-changing adiabatic transfer pulses. This combination allows us to achieve spatial separation between the arms of the interferometer. We account for the observed visibility of the resulting interference fringes and find that the effects which contribute the most are optical pumping and magnetic fields.
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