Phys. Rev. A 70, 052302 (2004) [5 pages]Entanglement of the Heisenberg chain with the next-nearest-neighbor interactionReceived 1 March 2004; revised 21 May 2004; published 1 November 2004 The features of the concurrences between the nearest-neighbors and that of the next-nearest-neighbors for the one-dimensional Heisenberg model with next-nearest-neighbor coupling J are studied as functions of temperature and J. The two concurrences exhibit a different dependence on J at the ground state, which could be interpreted from the point of view of the correlation functions. The threshold temperature at which the concurrence is zero and the temperature effect on the two concurrences for systems up to 12 sites are studied numerically. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.052302
DOI:
10.1103/PhysRevA.70.052302
PACS:
03.67.Mn, 03.65.Ud, 05.70.Jk, 75.10.Jm
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