Entanglement Entropy in an Antiferromagnetic Heisenberg Spin Chain with Boundary Impurities

Details Entanglement Entropy in an Antiferromagnetic Heisenberg Spin Chain with Boundary Impurities Entanglement Entropy in an Antiferromagnetic Heisenberg Spin Chain with Boundary Impurities

2010-06-09

arxiv.org/abs/1006.1732v1

J. Phys. B: At. Mol. Opt. Phys. 42 (2009) 015504

Physics

Quantum Physics

12 pages, 4 figures

Scientific paper

The effects of boundary impurities on the entanglement entropy in an antiferromagnetic Heisenberg opened spin-$1/2$ chain are investigated. The method of density-matrix renormalization-group is used to obtain the bipartite entanglement. The entropy increases when the length of the subsystem increases. It will approach to a constant when system length is very large. With the same impurity interaction, qutrit impurities of spin-$1$ can increase the entanglement entropy.

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