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# Towards spinor condensates at ultralow magnetic field: creating dipolar quantum gases

Brannan, Mark (2017)
Ph.D. thesis, University of Birmingham.

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## Abstract

This thesis outlines the design and construction of an experiment to investigate dipolar interactions within a rubidium-87 ($$^8$$$$^7$$Rb) spinor Bose-Einstein condensate (BEC). For dipolar interactions to drive population transfer between the internal states of a $$^8$$$$^7$$Rb BEC the ambient magnetic field must be reduced below 100 pT. To this end I have designed an active magnetic stabilisation system which is able to reduce the ambient magnetic field to a given level with 30 nT peak-to-peak fluctuations. A design is presented for a complementary passive magnetic shield in order to further reduce the ambient magnetic field, which electromagnetic simulations show should provide a factor of >10$$^8$$ reduction in the ambient magnetic field.

Type of Work: Ph.D. thesis. Bongs, Kai and Kowalczyk, Anna Colleges (2008 onwards) > College of Engineering & Physical Sciences School of Physics and Astronomy QC Physics University of Birmingham 7507
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