  We investigate the hypercube networks that their nodes are considered as
quantum harmonic oscillators. The entanglement of the ground state can be used
to quantify the amount of information each part of a network shares with the
rest of the system via quantum fluctuations. Therefore, the Schmidt numbers and
entanglement entropy between two special parts of Hypercube network, can be
calculated. To this aim, first we use the stratification method to rewrite the
adjacency matrix of the network in the stratification basis which is the matrix
representation of the angular momentum. Then the entanglement entropy and
Schmidt number for special partitions are calculated an- alytically by using
the generalized Schur complement method. Also, we calculate the entanglement
entropy between two arbitrary equal subsets (two equal subsets have the same
number of vertices) in H(3, 2) and H(4, 2) numerically, and we give the minimum
and maximum values of entanglement entropy in these two Hypercube network. Then
we can conjecture the minimum and maximum values of entanglement entropy for
equal subsets in H(d, 2).
