Magnetic structures and dynamics in a BEC with spin-dependent optical tweezers
Speaker: Alexander Pritchard
Affiliation: University of Queensland
Abstract
Multi-component Bose-Einstein condensates are an ideal system for studying interacting superfluid behaviours and phenomena, including magnetic ordering, domain formation, and coarsening dynamics in quantum superfluids of various miscibility. Here we have developed a protocol which allows the bespoke ordering and manipulation of magnetic domains in a multi spin-component condensate, using spin-dependent optical tweezers. The optical potential uses the tune-out wavelength, which for rubidium occurs at 790.018nm, which has a mF state dependence due to the vector light shift. With this, we have studied the dynamics of the domain under displacement using optical tweezers, as well with an applied magnetic gradient. We observe the emergence of soliton like structures in the BEC, along with signatures of vortex dipoles generation.
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