四极耦合系统频谱函数的三分点Pade近似

华东师范大学学报(自然科学版) ›› 2003, Vol. 2003 ›› Issue (3): 38-42.

四极耦合系统频谱函数的三分点Pade近似

屠坚敏;丁建华; 沈宇

华东师范大学物理系 ,上海 200062

收稿日期:2002-06-06 修回日期:2002-12-20 出版日期:2003-09-10 发布日期:2003-09-10

Three Fraction Pade Approach Spectral Function to the Coupled Quadrupole System

TU Jian-min; DING Jian-hua; SHEN Yu

Department of Physics, East China Normal University, Shanghai 200062, China

Received:2002-06-06 Revised:2002-12-20 Online:2003-09-10 Published:2003-09-10

摘要/Abstract

摘要： 精确计算出四极耦合系统中高温极限情况的二阶,四阶级矩,在Pade近似下获得自旋对关联函数的谱函数P(ω).以不同的的波矢对谱函数给出不同的激发态模式.讨论了这些参数作用于广谱函数的效果.

关键词: 谱函数, 四极耦合, 频率矩, Pade近似, 谱函数, 四极耦合, 频率矩, Pade近似

Abstract: The spectral function P(ω) of the spin pair correlation function in a coupled quadrupole system are evaluated using the pade approximation starting from the exact derivation of frequency second and fourth order moments at high temperature limit. Different excited stste model of the spectral functions are given for different wave vectors.The effects of these parameters on the generalized spectral function are discussed.

Key words: quadrupole, frequency moment, pade approximation, spectral function, quadrupole, frequency moment, pade approximation

屠坚敏;丁建华;沈宇. 四极耦合系统频谱函数的三分点Pade近似[J]. 华东师范大学学报(自然科学版), 2003, 2003(3): 38-42.

TU Jian-min;DING Jian-hua;SHEN Yu. Three Fraction Pade Approach Spectral Function to the Coupled Quadrupole System[J]. Journal of East China Normal University(Natural Sc, 2003, 2003(3): 38-42.