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A tunable macroscopic quantum system based on two fractional vortices

Video abstract for the article 'A tunable macroscopic quantum system based on two fractional vortices' by D M Heim, K Vogel, W P Schleich, D Koelle, R Kleiner and E Goldobin (D M Heim et al 2013 New J. Phys. 15 053020). Read the full article in New Journal of http://iopscience.iop.org/1367-2630/15/5/053020.