spin evolution 中文意思是什麼
spin evolution
解釋
自旋演化-
Based on a magnetic field controlled electron spin quantum system, utilizing the mechanism of realizing the unitary evolution of the quantum state through the quantum gate, an optimal control strategy to prepare an arbitrary quantum state is proposed
摘要針對以磁場為控制場的電子自旋量子比特系統，結合量子門實現量子態么正演化的量子態調控機制，提出了一種量子比特系統任意量子態的最優制備策略。 -
But difficulty in maths will come forth when meeting high spin particles if we using such method. on base of the characteristic of energy space, we obtained the wavefunctions and geometric phase by the trial function method in this paper. the berry phase of the system are also obtained after an evolution period
文中在絕熱近似下根據自旋粒子能級間隔特點用嘗試波函數法求出了旋轉磁場中高自旋粒子系統的波函數及幾何相位，解決了用一般方法求解時出現高階微分方程的困難。 -
With the time - evolution operator obtained by means of su ( 2 ) spin coherent states we are able to derive analytic time - evolution of spin probability - current between the two quantum dots for various initial states
我們利用su （ 2 ）自旋相干態獲得包括庫侖相互作用hubbard模型的時間演化算符，得到解析的含時自旋流。 -
The evolution of the local spin in a molecular magnet peg and [ mn4 ] 2 interacting with an injected electron is studied, we find that the variation in the magnetization of fe8, [ mn4 ] 2 and the electron spin crucially depends on the strength of the exchange interaction. we calculate the time evolution of the entanglement between the injected electron and fe8, [ mn4 ] 2
在磁性分子fe _ 8和[ mn4 ] _ 2的自旋動力學和糾纏演化的研究中，我們發現糾纏度隨著時間而改變；自旋和糾纏度的振動幅度強烈依靠于交換作用，結果提供了用分子磁體和極化電子進行編碼和讀出數據的可能性。 -
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
由數值模擬得到：當外場幅度較大時，存在一個特殊的溫度點（我們稱之t ） ，在這個溫度點，系統的平均磁化強度和平均等時自旋對關聯隨外場幅度的變化幾乎保持不變（即磁化率為零） ，並且這個溫度的大小依賴于自旋態數目q的變化， q越大，這個溫度就越小；而當外場較小時，確信系統存在有限大小的臨界溫度 -
The improved theory have succeeded in applying to gaussian model. in the third chapter, based on the single - spin transition dynamics, we discuss the time evolution of the local magnetization in the anisotropic three - dimensional xy model under the zero external field
第三章在單自旋躍遷臨界動力學的基礎上，討論零場下三維（ 3d ）各向異性晶格上xy模型的局域磁化強度的時間演化。 -
We can discuss the evolution of low spin particles in a magnetic field by solving schrodinger equation directly
對于低自旋粒子在磁場中的演化一般可用直接求解薛定諤方程的方法進行討論。
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