CAJ | 학술논문

利用不变本征算符法（IEO方法）计算X-Y-Z模型-各向异性He isenberg反铁磁系统的自旋波能量,并讨论此系统特殊情形下的自旋波能量及不变本征算符法的优点与不足.结果表明：利用IEO方法计算磁有序系统的自旋波能量非常方便,但是IEO方法不易给出磁有序系统的基态能量;线性近似下的Ham ilton ian量只包含算符的二次项,所以,利用IEO方法及算符的对易关系,能够简捷地计算出线性近似下的Ham ilton ian量体系的元激发能量.
이용불변본정산부법（IEO방법）계산X-Y-Z모형-각향이성He isenberg반철자계통적자선파능량,병토론차계통특수정형하적자선파능량급불변본정산부법적우점여불족.결과표명：이용IEO방법계산자유서계통적자선파능량비상방편,단시IEO방법불역급출자유서계통적기태능량;선성근사하적Ham ilton ian량지포함산부적이차항,소이,이용IEO방법급산부적대역관계,능구간첩지계산출선성근사하적Ham ilton ian량체계적원격발능량.
The spin wave energy of X-Y-Z model-anisotropic Heisenberg anti-ferromagnetism system was calculated by invariant eigen-operator method（IEO method）,and in this system the spin wave energy under especial qualification and advantages or deficiencies of invariant eigen-operator method was discussed in this paper.And received the following conclusions：it is convenient to use the IEO to calculate the spin waves energy of magnetic ordering system,but this way cannot give the base energy of the magnetic ordering system.Hamiltonian at the linear approximately only included the quadratic term of the operator,so by use of the IEO and the commutation relation of the operator was able to calculate the elementary excitation energy of Hamilton system at the linear approximately.