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Entanglement is believed to be crucial in macroscopic physical systems forunderstanding the collective quantum phenomena such as quantum phasetransitions. We start from and solve exactly a novel Yang-Baxter spin-1/2 chainmodel with inhomogeneous and anisotropic short-range interactions. For theground state, we show the behavior of neighboring entanglement in the parameterspace and find that the inhomogeneous coupling strengths affect entanglement ina distinctive way from the homogeneous case, but this would not affect thecoincidence between entanglement and quantum criticality.

Exact Solution of a Yang-Baxter Spin-1/2 Chain Model and Quantum Entanglement