Oleksandr Fialko, Marie-Coralie Delattre, Joachim Brand, Andrey R. Kolovsky
Finite topological quantum systems can undergo continuous metastable quantum
phase transitions to change their topological nature. Here we show how to
nucleate the transition between ring currents and dark soliton states in a
toroidally trapped Bose-Einstein condensate. An adiabatic passage to wind and
unwind its phase is achieved by explicit global breaking of the rotational
symmetry. This could be realized with current experimental technology.
View original:
http://arxiv.org/abs/1202.5083
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