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arXiv 0807.4431hep-th
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含高阶导数域的最小Action原理

The Principle of Least Action for Fields Containing Higher Order Derivatives

Nguyen Duc Minh

摘要:

一般来说,当把最小作用量原理推广到含有高阶导数的场时,不可能不考虑表面积分项,因为它对运动方程、能量动量张量和角动量张量的形式有直接的贡献。这一结果被应用到两个例子。在二维重力场中,为了使表面积分项消失,必须补充Dirichclet条件。相反,在刚性开弦的哈密顿描述中,运动方程被表面积分项修正。边界条件是根据某些运动方程的形式来分类的。

英文摘要:

When generalizing the principle of least action for fields containing higher order derivatives, in general, it is not possible not to take into account the surface integrated term since it gives direct contribution to the forms of the equations of motion,of the energy-momentum tensor and of the angular-momentum tensor. This result is applied to two examples. In two dimensional gravity, it is essential to supplement Dirichclet condition for the surface integrated terms to vanish. On the contrary, in Hamiltonian description of the open rigid string, the equation of motion is modified by surface integrated terms. Boundary conditions are classified according to forms of certain equations of motion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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