  We discuss recently formulated instanton-torus knot duality in
$\Omega$-deformed 5D SQED on $\mathbb{R}^4 \times S^1$ focusing at the
microscopic aspects of the condensate formation in the instanton ensemble.
Using the chain of dualities and geometric transitions we embed the SQED with a
surface defect into the $SU(2)$ SQCD with $N_f=4$ and identify the numbers
$(n,m)$ of the torus $T_{n,m}$ knot as instanton charge and electric charge.
The HOMFLY torus knot invariants in the fundamental representation provide
entropic factor in the condensate of the massless flavor counting the
degeneracy of the instanton--W-boson web with instanton and electric numbers
$(n,m)$ but different spin and flavor content. Using the inverse geometrical
transition we explain how our approach is related to the evaluation of the
HOMFLY invariants in terms of Wilson loop in 3d CS theory. The reduction to 4D
theory is briefly considered and some analogy with baryon vertex is
conjectured.
