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arXiv 1812.03751hep-th
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具有依赖于角度边界条件的开弦的Casimir能量

Casimir energy of an open string with angle-dependent boundary condition

A. Jahan, I. Brevik

摘要:

我们考虑两端分别放在两个实心梁(杆)上的开弦。这种设置相当于两个标量场,在它们的端点处具有一组约束。我们用三种不同的方法计算零点能和Casimir能:(1)用Hurwitz zeta函数,(2)用复频率平面上的围道积分法,(3)构造系统的格林函数。在围道积分的情况下,我们也提出了一个有限的温度表达式的Casimir能量,以及一个方便的解析近似高温。在零温度下的Casimir能量被发现是一个总和的Luscher势能和一项取决于光束之间的角度。这个模型的关系,一个类似的开弦模型与固定在其两端的电荷,在电磁场中移动,进行了讨论。

英文摘要:

We consider an open string with ends laying on the two different solid beams (rods). This set-up is equivalent to two scalar fields with a set of constraints at their end-points. We calculate the zero-point energy and the Casimir energy in three different ways: (1) by use of the Hurwitz zeta function, (2) by employing the contour integration method in the complex frequency plane, and (3) by constructing the Green's function for the system. In the case of contour integration we also present a finite temperature expression for the Casimir energy, along with a convenient analytic approximation for high temperatures. The Casimir energy at zero temperature is found to be a sum of the Luscher potential energy and a term depending on the angle between the beams. The relationship of this model to an analogous open string model with charges fixed at its ends, moving in an electromagnetic field, is discussed.

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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