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arXiv 0704.3667hep-thmath-phmath.MP
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物理弦系统在c=26倍处的置换型轨道折叠IV . Orientation Orbifolds包括Orientifolds

The Orbifolds of Permutation-Type as Physical String Systems at Multiples of c=26 IV. Orientation Orbifolds Include Orientifolds

M. B. Halpern

摘要:

在本系列的第四篇论文中,我澄清了{ \it定向orbifolds}(在$\hat c=52$具有扭曲开弦CFT)和{ \it定向folds}(在$c=26$具有非扭曲开弦)这一大类之间有些神秘的关系,这两者都与世界片定向反转自同构的划分有关。特别是-在以前的文件中的频谱线索-我表明,即使作为一个{ \it相互作用的字符串系统},一定的半整数模定向orbifold-string系统实际上是等价的原型orientifold。本文的副标题,定向orbifolds包括和推广标准的orientifolds,然后遵循,因为有许多其他定向orbifolds弦系统-具有更高的分数模-这是不等价的untwisted弦系统。

英文摘要:

In this fourth paper of the series, I clarify the somewhat mysterious relation between the large class of {\it orientation orbifolds} (with twisted open-string CFT's at $\hat c=52$) and {\it orientifolds} (with untwisted open strings at $c=26$), both of which have been associated to division by world-sheet orientation-reversing automorphisms. In particular -- following a spectral clue in the previous paper -- I show that, even as an {\it interacting string system}, a certain half-integer-moded orientation orbifold-string system is in fact equivalent to the archetypal orientifold. The subtitle of this paper, that orientation orbifolds include and generalize standard orientifolds, then follows because there are many other orientation orbifold-string systems -- with higher fractional modeing -- which are not equivalent to untwisted string systems.

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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