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Walking the landscape: The distribut...

Saltman, Alexander Harry.

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Walking the landscape: The distribution and evolution of string theory vacua.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Walking the landscape: The distribution and evolution of string theory vacua./
Author:	Saltman, Alexander Harry.
Description:	86 p.
Notes:	Adviser: Eva Silverstein.
Contained By:	Dissertation Abstracts International67-09B.
Subject:	Physics, Elementary Particles and High Energy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3235338
ISBN:	9780542895753

Walking the landscape: The distribution and evolution of string theory vacua.
Saltman, Alexander Harry.

Walking the landscape: The distribution and evolution of string theory vacua. - 86 p.

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.

ISBN: 9780542895753Subjects--Topical Terms:

1019488
Physics, Elementary Particles and High Energy.

Walking the landscape: The distribution and evolution of string theory vacua.
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005 20110621
008 110622s2006 eng d
020 $a 9780542895753
035 $a (UMI)AAI3235338
035 $a AAI3235338
040 $a UMI $c UMI
100 1 $a Saltman, Alexander Harry. $3 1277627
245 1 0 $a Walking the landscape: The distribution and evolution of string theory vacua.
300 $a 86 p.
500 $a Adviser: Eva Silverstein.
500 $a Source: Dissertation Abstracts International, Volume: 67-09, Section: B, page: 5165.
502 $a Thesis (Ph.D.)--Stanford University, 2006.
520 $a 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.
590 $a School code: 0212.
650 4 $a Physics, Elementary Particles and High Energy. $3 1019488
650 4 $a Physics, Theory. $3 1019422
690 $a 0753
690 $a 0798
710 2 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 67-09B.
790 $a 0212
790 1 0 $a Silverstein, Eva, $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3235338