A method for the numerical integration of oscillating functions 振蕩積分的一種處理方法
After a long time evolution , the system finally reaches a stable state at which the magnetization and the equal time spin - pair correlation are periodic oscillating functions with the equal period as the external field . numerical simulation shows : when the amplitude of external filed is large , there exits a particular temperature at which the average magnetization and the average spin - pair correlation are almost unaltered with various field amplitude ( i . e . magnetic susceptibility is zero ) , and the particular temperature depends on the number of the spin states , cutting down with q increasing 由數(shù)值模擬得到:當(dāng)外場(chǎng)幅度較大時(shí),存在一個(gè)特殊的溫度點(diǎn)(我們稱之t ) ,在這個(gè)溫度點(diǎn),系統(tǒng)的平均磁化強(qiáng)度和平均等時(shí)自旋對(duì)關(guān)聯(lián)隨外場(chǎng)幅度的變化幾乎保持不變(即磁化率為零) ,并且這個(gè)溫度的大小依賴于自旋態(tài)數(shù)目q的變化, q越大,這個(gè)溫度就越?。欢?dāng)外場(chǎng)較小時(shí),確信系統(tǒng)存在有限大小的臨界溫度