Dynamics of dimer and z spin component fluctuations in spin-1/2 XY chain

Condensed Matter Physics

关键词: quantum spin chains;    dynamic structure factors;   

DOI  :  10.5488/CMP.8.4.859

来源: DOAJ

【 摘 要 】

One-dimensional quantum spin-1/2 XY models admit the rigorous analysis not only of their static properties (i.e. the thermodynamic quantities and the equal-time spin correlation functions) but also of their dynamic properties (i.e. the different-time spin correlation functions, the dynamic susceptibilities, the dynamic structure factors). This becomes possible after exploiting the Jordan-Wigner transformation which reduces the spin model to a model of spinless noninteracting fermions. A number of dynamic quantities (e.g. related to transverse spin operator or dimer operator fluctuations) are entirely determined by two-fermion excitations and can be examined in much detail.

【 授权许可】

Unknown