Moduli potentials in string compactifications with fluxes: Mapping the discretuum

被引:77
作者
Brustein, R [1 ]
de Alwis, SP
机构
[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[2] Univ Colorado, Dept Phys, UCB 390, Boulder, CO 80309 USA
[3] Univ Calif Santa Barbara, KITP, Santa Barbara, CA 93106 USA
来源
PHYSICAL REVIEW D | 2004年 / 69卷 / 12期
关键词
D O I
10.1103/PhysRevD.69.126006
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We find de Sitter and flat space solutions with all closed string moduli stabilized in four-dimensional supergravity theories derived from heterotic and type II string theories, and explain how all the previously known obstacles to finding such solutions can be removed. Further, we argue that if the compact manifold allows a large enough space of discrete topological choices then it is possible to tune the parameters of four-dimensional supergravity such that a hierarchy is created, and the solutions lie in the outer region of moduli space in which the compact volume is large in string units, the string coupling is weak, and string perturbation theory is valid. We show that at least two light chiral superfields are required for this scenario to work; however, one field is sufficient to obtain a minimum with an acceptably small and negative cosmological constant. We discuss the cosmological issues of the scenario and the possible role of anthropic considerations in choosing the vacuum of the theory. We conclude that the most likely stable vacua are in or near the central region of moduli space where string perturbation theory is not strictly valid, and that anthropic considerations cannot help much in choosing a vacuum.
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页数:14
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