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arXiv 0906.0679hep-th
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关于D_p和D_{p-2}的注记

Remarks on D_p and D_{p-2} with each carrying a flux

J. X. Lu, Shan-Shan Xu

摘要:

我们探讨了D $_p$和D $_{p'}$之间相互作用的各种性质,每个都携带一个世界体积通量,并且当$p - p' = 2$时,$p'$膜沿着p膜的$p'$空间世界体积方向放置。仔细分析通过边界态方法计算的环振幅,我们发现,振幅的许多功能仍然类似于研究时,$p = p'$,如膜分离的性质,各种不稳定性的发病时,膜分离的顺序是字符串规模和发生对生产的开弦时,有一个相关的电通量本。此外,我们还发现了许多在无通量或有通量存在时$p = p'$所没有的相互作用的新特征,例如,相互作用的性质可以是排斥的,在一定条件下没有快子不稳定性的发生。即使在没有磁通量的情况下,在某些情况下,开弦的电子对产生率也会有指数级的增加,这可能足够显著,足以给出观测结果。

英文摘要:

We explore various properties of interaction between D$_p$ and D$_{p'}$ with each carrying a worldvolume flux and with the $p'$-branes placed along $p'$ spatial worldvolume directions of the p-branes at a separation when $p - p' = 2$. Carefully analyzing the annulus amplitudes calculated via the boundary state approach, we find that many features of amplitudes remain similar to those studied when $p = p'$ such as the nature of force on the brane separation, the onset of various instabilities when the brane-separation is on the order of string scale and the occurrence of pair production of open strings when there is a relevant electric flux present. In addition, we have also found many new features of interaction which don't appear in the absence of fluxes or when $p = p'$ in the presence of fluxes, for examples, the nature of interaction can be repulsive and there is no onset of tachyonic instability under certain conditions. Even in the absence of a magnetic flux, we can have an exponential enhancement of the rate of pair production of open strings in certain cases, which may be significant enough to give observational consequences.

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