  In a previous paper [B. Deb and G. S. Agarwal, Phys. Rev. A 90, 063417
(2014)], it was theoretically shown that, magneto-optical manipulation of low
energy scattering resonances and atom-molecule transitions could lead to the
formation of a bound state in continuum (BIC), provided there is no spontaneous
emission. We find that even an exceedingly small spontaneous decay from exited
molecular states can spoil the BIC. In this paper, we show how to circumvent
the detrimental effect of spontaneous emission by making use of vacuum-induced
coherence (VIC) which results in the cancellation or suppression of spontaneous
emission. VIC occurs due to the destructive interference between two
spontaneous decay pathways. An essential condition for VIC is the
non-orthogonality of the transition dipole moments associated with the decays.
Furthermore, the interference between decay pathways requires that the spacing
between the two decaying states must be comparable to or smaller than the
square root of the product of the two spontaneous linewidths. We demonstrate
that these conditions can be fulfilled by microwave dressing of two
appropriately chosen molecular excited states, opening a promising prospect for
the experimental realization of BIC of cold atoms.
