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Field theory methods in two-dimensio...

Ernebjerg, Morten.

Field theory methods in two-dimensional and heterotic string theories.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Field theory methods in two-dimensional and heterotic string theories.
作者:	Ernebjerg, Morten.
面頁冊數:	151 p.
附註:	Adviser: Andrew Strominger.
附註:	Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1039.
Contained By:	Dissertation Abstracts International68-02B.
標題:	Physics, Elementary Particles and High Energy.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3251267

Field theory methods in two-dimensional and heterotic string theories.
Ernebjerg, Morten.

Field theory methods in two-dimensional and heterotic string theories. - 151 p.

Adviser: Andrew Strominger.

Thesis (Ph.D.)--Harvard University, 2007.

In the second part, we prove the existence of topological rings in (0, 2) theories containing non-anomalous left-moving U(1) currents by which they may be twisted. While the twisted models are not topological, their ground operators form a ring under non-singular OPE which reduces to the (a,c) or (c,c) ring at (2, 2) points and define a quantum sheaf cohomology. In the special case of Calabi-Yau compactifications, these rings are shown to exist globally on the moduli space in many cases.Subjects--Topical Terms:

227490
Physics, Elementary Particles and High Energy.

Field theory methods in two-dimensional and heterotic string theories.
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245 1 0 $a Field theory methods in two-dimensional and heterotic string theories.
300 $a 151 p.
500 $a Adviser: Andrew Strominger.
500 $a Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1039.
502 $a Thesis (Ph.D.)--Harvard University, 2007.
520 # $a In the second part, we prove the existence of topological rings in (0, 2) theories containing non-anomalous left-moving U(1) currents by which they may be twisted. While the twisted models are not topological, their ground operators form a ring under non-singular OPE which reduces to the (a,c) or (c,c) ring at (2, 2) points and define a quantum sheaf cohomology. In the special case of Calabi-Yau compactifications, these rings are shown to exist globally on the moduli space in many cases.
520 # $a In the third part, we construct worldsheet descriptions of heterotic flux vacua as the IR limits of N = 2 gauge theories. Spacetime torsion is incorporated via a 2D Green-Schwarz mechanism in which a doublet of axions cancels a one-loop gauge anomaly. Manifest (0, 2) supersymmetry and the compactness of the gauge theory instanton moduli space suggest that these models, which include Fu-Yau models, are stable against worldsheet instantons.
520 # $a This thesis has three parts. In the first, we study the Das-Jevicki collective field description of arbitrary classical solutions in the c = 1 matrix model, which are believed to describe nontrivial spacetime backgrounds in 2D string theory. Our analysis naturally includes the case of a Fermi droplet cosmology. We cast the droplet collective field theory in standard coordinates and comment on the form of the interactions.
590 $a School code: 0084.
650 # 0 $a Physics, Elementary Particles and High Energy. $3 227490
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710 0 # $a Harvard University. $3 212445
773 0 # $g 68-02B. $t Dissertation Abstracts International
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790 1 0 $a Strominger, Andrew, $e advisor
791 $a Ph.D.
792 $a 2007
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