  We study the thermal quantum correlations in tripartite atomic system under
the existence of Herring-Flicker (HF) coupling among the atoms. We explore two
topologically distinct configurations of three coupled two-level atoms, viz.,
loop and line, differing in their coupling pattern. Further, the systems having
asymmetric arrangement of atoms are quantum mechanically correlated more
strongly than systems having symmetric arrangements. The variable nature of HF
coupling leads to the increase of both concurrence and discord from zero to a
saturation value from where they decrease to zero as a function of inter-atomic
distance. Further separation leads to both the quantities attaining another
saturation value. This controlled correlations play an important role in the
design of quantum data buses that can transfer quantum states to establish
quantum communication. The systems coupled via HF coupling will be efficient
for this task as they are maximally entangled in parametrically controlled
manner. Thus, these systems will be propitious for various quantum protocols
such as secure communication, quantum cryptography, quantum key distribution
etc.
