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题名: Weak finite-size dependence of velocity and strong phase dependence of central charge
作者: Lin, ZB ;  Zhang, J ;  Qin, SJ ;  Lei, YA
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2002
卷号: 37, 期号:3, 页码:367-372
关键词: SPIN CHAIN ;  MAGNETIZATION PLATEAU ;  CONFORMAL-INVARIANCE ;  HEISENBERG CHAIN ;  BAND INSULATOR ;  MOTT INSULATOR ;  STATE ;  FIELD ;  TRANSITIONS
学科分类: Physics
通讯作者: Lin, ZB , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
部门归属: Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China; Kyushu Univ, Dept Phys, Higashi Ku, Fukuoka 8128581, Japan; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study the finite-size scaling behavior of velocity and central charge for different coupling constants and different phases in (1+1)-dimensional lattice model in very short chains. Using XXZ spin 1/2 chains with 15 or fewer sites, we demonstrate the weak finite-size dependence of spinon velocity for any magnitude of coupling strength J(x) and the strong phase dependence of central charge. This behavior of velocity and central charge in different coupling constants and different phases gives a method to determine phase transitions of (1+1)-dimensional models. This method is simple and efficient by utilizing only the ground state energy of very short finite-size chains. It is also general and powerful for various one-dimensional lattice models and it uncovers even the weakest Berezinski-Kosterlitz-Thouless phase transitions.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000174671700023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13570
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Lin, ZB,Zhang, J,Qin, SJ,et al. Weak finite-size dependence of velocity and strong phase dependence of central charge[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2002,37(3):367-372.
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