von Neumann entropy signatures of a transition in one-dimensional electron systems with long-range correlated disorder

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/65750

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題名:	von Neumann entropy signatures of a transition in one-dimensional electron systems with long-range correlated disorder
作者:	Gong, Long-Yan;Tong, Pei-Qing;Zhou, Zi-Cong
貢獻者:	淡江大學物理學系
日期:	2010-10
上傳時間:	2011-10-22 09:25:14 (UTC+8)
出版者:	Heidelberg : Springer
摘要:	We study the von Neumann entropy and related quantities in one-dimensional electron systems with on-site long-range correlated potentials. The potentials are characterized by a power-law power spectrum S(k) ∝ 1/kα, where α is the correlation exponent. We find that the first-order derivative of spectrum-averaged von Neumann entropy is maximal at a certain correlation exponent αm for a finite system, and has perfect finite-size scaling behaviors around αm . It indicates that the first-order derivative of the spectrum-averaged von Neumann entropy has singular behavior, and αm can be used as a signature for transition points. For the infinite system, the threshold value αc = 1.465 is obtained by extrapolating αm.
關聯:	The European Physical Journal B 77(3), pp.413-417
DOI:	10.1140/epjb/e2010-00283-2
顯示於類別:	[物理學系暨研究所] 期刊論文

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