Quantification of entanglement from magnetic susceptibility for a Heisenberg spin 1/2 system |
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Authors: | Tanmoy Chakraborty Harkirat SinghDiptaranjan Das Tamal K SenChiranjib Mitra |
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Institution: | Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur Campus, PO BCKV Campus Main Office, Mohanpur – 741252, Nadia, West Bengal, India |
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Abstract: | We report temperature and magnetic field dependent magnetization and quantification of entanglement from the experimental data for dichloro (thiazole) copper (II), a Heisenberg spin chain system. The plot of magnetic susceptibility vs. temperature indicates an infinite spin chain. Isothermal magnetization measurements (as functions of magnetic field) were performed at various temperatures below the antiferromagnetic (AFM) ordering, where the AFM correlations persist significantly. These magnetization curves are fitted to the Bonner–Fisher model. Magnetic susceptibility is used as an entanglement witness to quantify the amount of entanglement in the system. |
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Keywords: | Spin chain Antiferromagnetism Entanglement |
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