Quantum nonlocality of Heisenberg XX model with site-dependent coupling strength

2003/11/30 by Chunfeng Wu, Jing-Ling Chen, D. M. Tong +2
Computer Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Coupling strength #Ferromagnetism #Heisenberg model #Magnetic field #Materials science #Mathematical physics #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum correlation #Quantum discord #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Quantum nonlocality #quant-ph

paper · pdf · doi:10.1088/0305-4470/37/47/016

published as J. Phys. A: Math. Gen. 37 (2004) 11475-11483 · 10 pages and 2 figures, published version

openalex publication_date 2004/11/11 · arxiv created 2004/12/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We show that the generalized Bell inequality is violated in the extended Heisenberg model when the temperature is below a threshold value. The threshold temperature values are obtained by constructing exact solutions of the model using the temperature-dependent correlation functions. The effect due to the presence of external magnetic field is also illustrated.

Citations

• Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels
• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Bell’s Theorem for GeneralN-Qubit States
• Entanglement in the quantum HeisenbergXYmodel
• Quantum cryptography based on Bell’s theorem
• Quantum theory, the Church–Turing principle and the universal quantum computer
• Quantum Theory: Concepts and Methods