Magnetic field effects on the optimal fidelity of standard teleportation via the two qubits Heisenberg XX chain in thermal equilibrium

2003/12/15 by Shangbin Li, Shang-Bin Li, Li, Shang-Bin +3
Computer Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Physics (quant-ph) #Quantum many-body systems #quant-ph

paper · pdf · doi:10.48550/arxiv.quant-ph/0312125

8 pages, 3 figures

arxiv created 2003/12/15 · openalex publication_date 2003/12/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the two qubits Heisenberg XX chain with magnetic impurity in the presence of the external magnetic field and calculate the optimal fidelity of standard teleportation via the thermal equilibrium state. It is found that the combined influence of magnetic impurity and external magnetic field can increase the critical temperatures of entanglement and quantum teleportation without limit. The relation between two kinds of critical temperatures is revealed.

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