Parallel entangling gate operations and two-way quantum communication in spin chains

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