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Entanglement in One-Dimensional Anderson Model with Long-Range Correlated Disorder |
| GUO Zi-Zheng |
| College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022 |
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| Cite this article: |
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GUO Zi-Zheng 2008 Chin. Phys. Lett. 25 1079-1082 |
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Abstract By using the measure of concurrence, the entanglement of the ground state in the one-dimensional Anderson model is studied with consideration of the long-range correlations. Three kinds of correlations are discussed. We compare the effects of the long-rang Gaussian and power-law correlations between the site energies on the concurrence, and demonstrate the existence of the band structure of the concurrence in the power-law case. The
emergence of the sharp kink on the concurrence curve shown in the intraband or in the interband indicates the position at which the localization extent of the state may have the severe variation. We use the Rudin--Shapiro model to describe the site energy distribution of the nucleotides of the DNA chain: guanine (G), adenine (A), cytosine(C), thymine (T). This model is a tetradic quasiperiodic sequence and is shown to be long-range correlated. Our results show that correlations between the site energies increase the concurrences.
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| Keywords:
71.23.An
72.15.Rn
03.67.Mn
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Received: 12 November 2007
Published: 27 February 2008
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| PACS: |
71.23.An
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(Theories and models; localized states)
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72.15.Rn
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(Localization effects (Anderson or weak localization))
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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