  A tight-binding model of a multi-leg ladder network with a continuous
quasiperiodic modulation in both the site potential and the inter-arm hopping
integral is considered. The model mimics optical lattices where ultra-cold
fermionic or bosonic atoms are trapped in double well potentials. It is
observed that, the relative phase difference between the on-site potential and
the inter-arm hopping integral, which can be controlled by the tuning of the
interfering laser beams trapping the cold atoms, can result in a mixed spectrum
of one or more absolutely continuous subband(s) and point like spectral
measures. This opens up the possibility of a re-entrant metal-insulator
transition. The subtle role played by the relative phase difference mentioned
above is revealed, and we corroborate it numerically by working out the
multi-channel electronic transmission for finite two-, and three-leg ladder
networks. The extension of the calculation beyond the two-leg case is trivial,
and is discussed in the work.
