Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Reinbacher, Rene"'
Publikováno v:
J.Math.Phys.49:032302,2008
We develop numerical methods for approximating Ricci flat metrics on Calabi-Yau hypersurfaces in projective spaces. Our approach is based on finding balanced metrics, and builds on recent theoretical work by Donaldson. We illustrate our methods in de
Externí odkaz:
http://arxiv.org/abs/hep-th/0612075
Publikováno v:
JHEP 0705:041,2007
We provide the methods to compute the complete massless spectra of a class of recently introduced supersymmetric E8 x E8 heterotic string models which invoke vector bundles with U(N) structure group on simply connected Calabi-Yau manifolds and which
Externí odkaz:
http://arxiv.org/abs/hep-th/0612039
Publikováno v:
JHEP0712:083,2007
We develop an iterative method for finding solutions to the hermitian Yang-Mills equation on stable holomorphic vector bundles, following ideas recently developed by Donaldson. As illustrations, we construct numerically the hermitian Einstein metrics
Externí odkaz:
http://arxiv.org/abs/hep-th/0606261
We compute the particle spectrum and some of the Yukawa couplings for a family of heterotic compactifications on quintic threefolds X involving bundles that are deformations of TX+O_X. These are then related to the compactifications with torsion foun
Externí odkaz:
http://arxiv.org/abs/hep-th/0605203
We discuss conjectures following from the attractor mechanism in type II string theory about the possible Chern classes of stable holomorphic vector bundles on Calabi-Yau threefolds. In particular, we give sufficient conditions for Chern classes to c
Externí odkaz:
http://arxiv.org/abs/math/0604597
Publikováno v:
JHEP0506:070,2005
A formalism for determining the massless spectrum of a class of realistic heterotic string vacua is presented. These vacua, which consist of SU(5) holomorphic bundles on torus-fibered Calabi-Yau threefolds with fundamental group Z_2, lead to low ener
Externí odkaz:
http://arxiv.org/abs/hep-th/0411156
Publikováno v:
JHEP0504:008,2005
Expressions for the number of moduli of arbitrary SU(n) vector bundles constructed via Fourier-Mukai transforms of spectral data over Calabi- Yau threefolds are derived and presented. This is done within the context of simply connected, elliptic Cala
Externí odkaz:
http://arxiv.org/abs/hep-th/0410200
Publikováno v:
JHEP0412:062,2004
A torus fibered Calabi-Yau threefold with first homotopy group Z_3 x Z_3 is constructed as a free quotient of a fiber product of two dP_9 surfaces. Calabi-Yau threefolds of this type admit Z_3 x Z_3 Wilson lines. In conjunction with SU(4) holomorphic
Externí odkaz:
http://arxiv.org/abs/hep-th/0410055
Publikováno v:
Phys.Lett. B618 (2005) 259-264
A methodology for computing the massless spectrum of heterotic vacua with Wilson lines is presented. This is applied to a specific class of vacua with holomorphic SU(5)-bundles over torus-fibered Calabi-Yau threefolds with fundamental group Z_2. Thes
Externí odkaz:
http://arxiv.org/abs/hep-th/0409291
Publikováno v:
JHEP0412:054,2004
Techniques are presented for computing the cohomology of stable, holomorphic vector bundles over elliptically fibered Calabi-Yau threefolds. These cohomology groups explicitly determine the spectrum of the low energy, four-dimensional theory. Generic
Externí odkaz:
http://arxiv.org/abs/hep-th/0405014