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arXiv 1102.5001hep-th
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I型宇宙学中的无质量D弦和模稳定化

Massless D-strings and moduli stabilization in type I cosmology

John Estes, Lihui Liu, Herve Partouche

摘要:

本文研究了在有限温度和弱耦合下,D ≥ 4维的最大超对称杂化弦气体的自由能F诱导的宇宙演化。我们表明,F,它发挥了有效的潜力的作用,有最小值相关的增强规范对称性,所有的内部模可以吸引和动态稳定。利用这一事实,杂合/型I S-对偶仍然有效,在有限的温度下,可以应用在每一个时刻的准静态演化,我们发现在对偶型I宇宙学,所有内部NS NS和RR模在封闭的字符串部门和威尔逊线在开放的字符串部门可以稳定。对于D=6的特殊情况,内部体积模量保持平坦的方向,同时双光子稳定。一个重要的作用是由轻D弦模式包装的内部流形,其贡献的自由能不能被忽略,即使在弱耦合的I型字符串。结果,在类型I侧的内半径期望值的数量级是(lambda_I α ')^{1/2},其中lambda_I是十维弦耦合。对I型自由能的非微扰修正也可以被描述为“热E1瞬子”的效应,其世界表包裹了紧凑的欧几里得时间周期。

英文摘要:

We consider the cosmological evolution induced by the free energy F of a gas of maximally supersymmetric heterotic strings at finite temperature and weak coupling in dimension D>=4. We show that F, which plays the role of an effective potential, has minima associated to enhanced gauge symmetries, where all internal moduli can be attracted and dynamically stabilized. Using the fact that the heterotic/type I S-duality remains valid at finite temperature and can be applied at each instant of a quasi-static evolution, we find in the dual type I cosmology that all internal NS-NS and RR moduli in the closed string sector and the Wilson lines in the open string sector can be stabilized. For the special case of D=6, the internal volume modulus remains a flat direction, while the dilaton is stabilized. An essential role is played by light D-string modes wrapping the internal manifold and whose contribution to the free energy cannot be omitted, even when the type I string is at weak coupling. As a result, the order of magnitude of the internal radii expectation values on the type I side is (lambda_I alpha')^{1/2}, where lambda_I is the ten-dimensional string coupling. The non-perturbative corrections to the type I free energy can alternatively be described as effects of "thermal E1-instantons", whose worldsheets wrap the compact Euclidean time cycle.

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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