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Notes on non-trivial and logarithmic conformal field theories with c = 0

Michael Flohr and Annekathrin Müller-Lohmann

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We examine the properties of two-dimensional conformal field theories (CFTs) with vanishing central charge based on the extended Kac table for c(9, 6) = 0 using a general ansatz for the stress energy tensor residing in a Jordan cell of rank two.

Within this set-up we will derive the operator product expansions (OPEs) and two-point functions of the stress energy tensor T(z) and its logarithmic partner field t(z) and illustrate this by a bosonic field realization.

We will show why our approach may be more promising than those chosen in the literature so far, including a discussion on properties of the augmented minimal model with vanishing central charge such as full conformal invariance of the vacuum as a state in an irreducible representation.

Furthermore we will present a more general solution of another solution to the c → 0 catastrophe based on a logarithmic CFT tensor model. As an example, we consider a tensor product of the well known c = −2 logarithmic CFT with a fourfold Ising model.

We give an overview of the possible configurations and various consequences for the two-point functions and the OPEs of the stress energy tensor T(z) and its logarithmic partner field t(z). We will motivate why, due to the full conformal invariance of the vacuum at c = 0, we should assume a Jordan cell for the identity, since t(z) is presumably a descendant of a new h = 0 field.


Keywords

percolation problems (theory)

disordered systems (theory)

conformal field theory

 

E-print Number: hep-th/0510096

Cited: by |

Refers: to

PACS

11.25.Hf Conformal field theory, algebraic structures

11.30.Pb Supersymmetry

MSC

81T60 Supersymmetric field theories

81T40 Two-dimensional field theories, conformal field theories, etc.

Subjects

Particle physics and field theory

Dates

Issue 04 (April 2006)

Received 22 November 2005, accepted for publication 16 March 2006

Published 12 April 2006



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