Control of impurity over entanglement in Heisenberg chain

✍ Scribed by W.W. Cheng; Y.X. Huang; T.K. Liu; H. Li

• Book ID: 104084693
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 206 KB
• Volume: 39
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.03.001

✦ Synopsis

The thermal entanglement in a three-qubit Heisenberg XXX spin chains with a impurity site is investigated under an external magnetic field. For a fixed x ðx ¼ 2 or À2Þ, we discussed the effect of the impurity parameter g and the magnetic field B to the concurrence. The calculation results reveal that the impurity parameter g and the magnetic field B can significantly effect the pair entanglement between the spin lattices with a different way on the case of anti-ferromagnetic (x ¼ 2) or ferromagnetic (x ¼ À2).