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Updated: May 5, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Generation and Transfer of Entanglement in a Circular Spin System
Vinh Le Duc1, Joanna K Kalaga2, Wiesław Leoński2
1Tinh Gia 3 High School, Nghi Son District, Thanh Hóa 42700, Vietnam.
Abstract:
We consider an Ising-type model of six interacting spins in a closed circular configuration. We discuss two scenarios in which the system is initially in either an entangled or a product state. In the first scenario, we analyze how entanglement is transferred among pairs of spins and how the coupling strength affects such a transfer. In the second scenario, we demonstrate that the creation of a strongly entangled state depends on the coupling parameters. We demonstrate that careful selection of the coupling strength can increase the degree of entanglement generated in the system, as measured by negativity, and control which spin pair becomes strongly entangled. Additionally, the relationship between linear entropy-a measure of mixedness-and negativity, a measure of entanglement, is discussed.
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