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7 papers · 2 filters
Conformal perturbation theory beyond the leading order
Matthias R. Gaberdiel, Anatoly Konechny, Cornelius Schmidt-Colinet
Higher order conformal perturbation theory is studied for theories with and without boundaries. We identify systematically the universal quantities in the beta function equations,…
Modular differential equations for torus one-point functions
Matthias R Gaberdiel, Samuel Lang
It is shown that in a rational conformal field theory every torus one-point function of a given highest weight state satisfies a modular differential equation. We derive and solve…
Bulk induced boundary perturbations for N=1 superconformal field theories
Matthias R Gaberdiel, Oliver Schlotterer
The N=1 superconformal circle theory consisting of a free boson and a free fermion is considered. At any radius the theory has standard Dirichlet and Neumann branes, but for ration…
Fluctuations of the baryonic flux-tube junction from effective string theory
Melanie Pfeuffer, Gunnar S. Bali, Marco Panero
In quenched QCD, where the dynamic creation of quark-antiquark pairs out of the vacuum is neglected, a confined baryonic system composed of three static quarks exhibits string-like…
Extremal N=(2,2) 2D Conformal Field Theories and Constraints of Modularity
Matthias R. Gaberdiel, Sergei Gukov, Christoph A. Keller +2
We explore the constraints on the spectrum of primary fields implied by modularity of the elliptic genus of N=(2,2) 2D CFT's. We show that such constraints have nontrivial implicat…
Heterotic AdS_3/CFT_2 duality with (0,4) spacetime supersymmetry
Stefan Hohenegger, Christoph A. Keller, Ingo Kirsch
We discuss the AdS_3/CFT_2 duality of a heterotic three-charge model with (0,4) target space supersymmetry. The worldsheet theory for heterotic strings on the AdS_3 x S^3/Z_N x T^4…