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arXiv 1107.4846hep-th
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螺旋环面边界条件下的Casimir效应

Casimir effect with a helix torus boundary condition

Xiang-hua Zhai, Xin-zhou Li, Chao-Jun Feng

摘要:

利用推广的Chowla-Selberg公式研究了平坦($D+1$)维时空中螺旋环面边界条件下标量场的Casimir效应.我们得到了无质量和有质量标量场下任意$D$的Casimir能量密度和压强的精确结果。数值计算表明,一旦时空的拓扑结构固定,螺旋线的尺寸比将是一个决定性因素。存在一个临界值$r_{crit}$,即压力消失时长度之比$r$。随着$r$通过$r_{crit}$的比例增加,压力从负变为正。在有质量的情况下,我们发现当质量趋近于零时,压强趋于无质量场的结果。此外,在D=3的情况下,存在另一个临界长度比$r_{crit}^{\prime}$,并且压力与$r=r_{crit}^{\prime}$处的质量无关。

英文摘要:

We use the generalized Chowla-Selberg formula to consider the Casimir effect of a scalar field with a helix torus boundary condition in the flat ($D+1$)-dimensional spacetime. We obtain the exact results of the Casimir energy density and pressure for any $D$ for both massless and massive scalar fields. The numerical calculation indicates that once the topology of spacetime is fixed, the ratio of the sizes of the helix will be a decisive factor. There is a critical value $r_{crit}$ of the ratio $r$ of the lengths at which the pressure vanishes. The pressure changes from negative to positive as the ratio $r$ passes through $r_{crit}$ increasingly. In the massive case, we find the pressure tends to the result of massless field when the mass approaches zero. Furthermore, there is another critical ratio of the lengths $r_{crit}^{\prime}$ and the pressure is independent of the mass at $r=r_{crit}^{\prime}$ in the D=3 case.

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