2013/05/24 by P. R. Wells, P. R. Wells Jr., C. M. Chaves +3 · 1 citation
Physics and Astronomy · #Antiferromagnetism #Chain (unit) #Coupling (piping) #Density matrix #Ground state #Heisenberg model #Physics of Superconductivity and Magnetism #Quantum many-body systems #Realization (probability) #Spin (aerodynamics) #Spins #Topological Materials and Phenomena #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1063/1.4825152
published in Applied Physics Letters 103(17) (American Institute of Physics) · arXiv admin note: text overlap with arXiv:1111.4513
arxiv created 2013/05/24 · openalex publication_date 2013/10/21 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Pairwise quantum correlations in the ground state of an N-spins antiferromagnetic Heisenberg chain are investigated. By varying the exchange coupling between two neighboring sites, it is possible to reversibly drive spins from entangled to disentangled states. For even N, the two-spin density matrix is written in the form of a Werner state, allowing identification of its single parameter with the usual spin-spin correlation function. The N = 4 chain is identified as a promising system for practical demonstrations of non-classical correlations and the realization of Werner states in familiar condensed matter systems. Fabrication and measurement ingredients are within current capabilities.