# 瞬子英文

• instanton
###### 例句與用法
• The life time of the metastable n - phase state is evaluated explicitly in term of the instanton method
對于亞穩的-位相態，我們利用瞬子技術計算了它的衰變率或壽命。
• It is our main purpose to extend the static instantons of scalar 4 - and sine - gordon - theory of 1 + 1 dimension to that of 2 + 1 dimension
本文的主要目的是將1 + 1維非線性場的靜態瞬子理論推廣到2 + 1維。
• First , we give a brief review of instanton theory of 1 + 1 dimension . then we obtain the instantons in 4 - field model of 2 + 1 dimension
文章首先回顧了1 + 1維~ 4和sine - gordon場方程靜態瞬子的相關理論，討論了靜態瞬子的能量密度、及其穩定性。
• In particular , it is found that static instantons are just domain wall solutions in the magnetic film . stability of the domain walls is also investigated in terms of the instanton theory
我們發現靜態周期瞬子正是鐵磁膜中的疇壁，用相應的瞬子理論討論了疇壁的穩定性。
• It is the main purpose of this paper to calculate the energy splitting of ground state and excited states induced by thermally assisted quantum tunneling . first , a brief introduction is given for the theoretical and experimental studies on the magnetic macroscopic quantum effects . then , spin tunneling in a uniaxial ferromagnetic particle in transverse magnetic field is converted to a pseudoparticle moving in effective double - well potential with the help of the effective potential description of quantum spin systems developed by ulyanov and zaslavskii . finally using the periodic instanton method we evaluate the transition amplitude , energy shift and prefactor of wkb exponential and the energy splitting of ground state and the tunneling rate for excited states induced by thermally assisted quantum tunneling are obtained
文章首先對磁性宏觀量子效應的理論和實驗方面作了簡單介紹，然后借助于ulyanov和zaslavskii發展的一種等效勢描述方法，把外磁場沿難磁化軸方向時的自旋隧穿約化成在等效雙勢阱中運動的粒子，利用瞬子方法給出基態能級劈裂，最后利用周期瞬子方法分別計算了隧穿幅、能級移動以及wkb前因子，從而給出由于熱助量子隧穿引起的激發態的隧穿率。