作者 Saltman, Alexander Harry
書名 Walking the landscape: The distribution and evolution of string theory vacua
國際標準書號 9780542895753
book jacket
說明 86 p
附註 Source: Dissertation Abstracts International, Volume: 67-09, Section: B, page: 5165
Adviser: Eva Silverstein
Thesis (Ph.D.)--Stanford University, 2006
The number of perturbatively stable compactifications of string theory appears to be quite large, even when limited to those with a cosmological constant. Although the richness of this "landscape" of vacua may offer solutions to some outstanding problems, notably the cosmological constant problem, it also may dramatically reduce the predictivity of string theory. I demonstrate two classes of vacua that have so far been little explored, but that are quite possibly larger than the more well-known classes. In addition to enumerating possible vacua, it is necessary to study the selection rules that may govern the probability of ending up in a particular vacuum starting from a hot, small early universe. To this end, I also discuss certain topology-changing transitions between string compactifications that progress through the condensation of a tachyon, and therefore are essentially irreversible. These transitions have distinct low-energy signatures and suggest that string theory may have a preference for topologically simple compactifications
School code: 0212
DDC
Host Item Dissertation Abstracts International 67-09B
主題 Physics, Theory
Physics, Elementary Particles and High Energy
0753
0798
Alt Author Stanford University