Based on the London approximation, we investigate numerically the stab
ility of the elementary configurations of entanglement, the twisted pa
ir and the twisted triplet, in the vortex-lattice and -liquid phases.
We find that, except for the dilute limit, the twisted pair is unstabl
e and hence irrelevant in the discussion of entanglement. In the latti
ce phase the twisted triplet constitutes a metastable, confined config
uration of high energy. Loss of lattice symmetry upon melting leads to
deconfinement, and the twisted triplet turns into a low-energy helica
l configuration.