Unitary Design of Quantum Spin Networks for Robust Routing, Entanglement Generation, and Phase Sensing

Spin chains can be used to describe a wide range of platforms for quantum computation and information. They enable the understanding, demonstration, modeling numerous useful phenomena, such as high fidelity transfer states, creation distribution entanglement, resources measurement-based processing. In this paper, more complex spin system, 2D network (SN) engineered by applying suitable unitaries two uncoupled chains, is studied. Considering only single-excitation subspace SN, it demonstrated that system operated router, directing information through SN. It also shown serve generate maximally entangled states between sites. Furthermore, illustrated SN sensor device able determine an unknown phase applied spin. A detailed investigation effects static disorder in shows robust against different types disorder.