期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
卷 38, 期 33, 页码 7377-7388出版社
IOP PUBLISHING LTD
DOI: 10.1088/0305-4470/38/33/011
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By using the concept of concurrence, the entanglement of periodic anisotropic XY chains in a transverse field is studied numerically. It is found that the derivatives partial derivative lambda C(1) of nearest-neighbour concurrence diverge at quantum critical points. By proper scaling, we found that all the derivatives partial derivative lambda C (1) for periodic XY chains in the vicinity of quantum critical points have the same behaviours as that of a uniform chain.
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