2005/11/30 by Fabrizio Anfuso, F Anfuso, Sebastian Eggert +1 · 1 citation
Physics and Astronomy · #Antiferromagnetism #Heisenberg model #Impurity #Monte Carlo method #Physics of Superconductivity and Magnetism #Quantum #Quantum Monte Carlo #Quantum and electron transport phenomena #Theoretical and Computational Physics #Valence (chemistry) #Valence bond theory #cond-mat.str-el
paper · pdf · doi:10.1209/epl/i2005-10380-y
published as Europhys. Lett. 73, 271 (2006). · 8 pages, 6 figures, accepted by Europhys. Lett. The latest pdf file is available at http://www.physik.uni-kl.de/eggert/papers/interact2d.pdf
arxiv created 2005/11/30 · openalex publication_date 2005/12/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We are considering the interplay between several non-magnetic impurities in the spin-(1/2) Heisenberg antiferromagnet in chains, ladders and planes by introducing static vacancies in numerical quantum Monte Carlo simulations. The effective potential between two and more impurities is accurately determined, which gives a direct measure of the quantum correlations in the systems. Large effective interaction potentials are an indication of strong quantum correlations in the system and reflect the detailed nature of the valence bond ground states. In two-dimensions (2D) the interactions are smaller, but can still be analyzed in terms of valence bonds.