期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 41, 期 13, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/41/13/135304
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We investigate entanglement properties in the ground state of the open/periodic SU(n) generalized valence-bond-solid state consisting of representations of SU(n). We obtain exact expressions for the reduced density matrix of a block of contiguous spins and explicitly evaluate the von Neumann and the Renyi entropies. We discover that the Renyi entropy is independent of the parameter a in the limit of large block sizes and its value 2 log n coincides with that of von Neumann entropy. We also find the direct relation between the reduced density matrix of the subsystem and edge states for the corresponding open boundary system.
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