  The power of a quantum circuit is determined through the number of two-qubit
entangling gates that can be performed within the coherence time of the system.
In the absence of parallel quantum gate operations, this would make the quantum
simulators limited to shallow circuits. Here, we propose a protocol to
parallelize the implementation of two-qubit entangling gates between multiple
users which are spatially separated, and use a commonly shared spin chain
data-bus. Our protocol works through inducing effective interaction between
each pair of qubits without disturbing the others, therefore, it increases the
rate of gate operations without creating crosstalk. This is achieved by tuning
the Hamiltonian parameters appropriately, described in the form of two
different strategies. The tuning of the parameters makes different bilocalized
eigenstates responsible for the realization of the entangling gates between
different pairs of distant qubits. Remarkably, the performance of our protocol
is robust against increasing the length of the data-bus and the number of
users. Moreover, we show that this protocol can tolerate various types of
disorders and is applicable in the context of superconductor-based systems. The
proposed protocol can serve for realizing two-way quantum communication.
