Type-2 superconductors used as tweezers

A just published work (PRA, 81, 063408, 2010) did calculations on how type-2 superconductors might be used to trap atoms or other tiny particles. In comparison with other choices, the scheme there-proposed has less loss of coherences. Their calculations proved type-2 SC as a very versatile device in that direction. What holds the key as tweezers is the formation of vortice, which allows the existence of local magnetic field. Such vortice appear in type-2 SC, but not in type-1.