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Publications Influence

Boundary conditions in rational conformal field theories

- R. Behrend, P. Pearce, V. Petkova, J. Zuber
- Physics
- 24 July 2000

We develop further the theory of RationalConformalFieldTheories (RCFTs) on a cylinder with specified boundaryconditions emphasizing the role of a triplet of algebras: the Verlinde, graph fusion and… Expand

174 31

Generalised twisted partition functions

- V. Petkova, J. Zuber
- Physics
- 3 November 2000

Abstract We consider the set of partition functions that result from the insertion of twist operators compatible with conformal invariance in a given 2D conformal field theory (CFT). A consistency… Expand

184 29- PDF

The many faces of Ocneanu cells

- V. Petkova, J. Zuber
- Physics
- 23 January 2001

We define generalised chiral vertex operators covariant under the Ocneanu ``double triangle algebra'' ${\cal A}\,$ a novel quantum symmetry intrinsic to a given rational 2-d conformal field theory.… Expand

134 14- PDF

Boundary Conditions in Rational Conformal Field Theories

- R. Behrend, P. Pearce, V. Petkova, J. Zuber
- Physics
- 4 August 1999

We develop further the theory of Rational Conformal Field Theories (RCFTs) on a cylinder with specified boundary conditions emphasizing the role of a triplet of algebras: the Verlinde, graph fusion… Expand

119 11- PDF

All positive energy unitary irreducible representations of extended conformal supersymmetry

- V. Dobrev, V. Petkova
- Physics
- 7 November 1985

We give the list of all positive energy UIR's of the conformal superalgebra su(2, 2N). They are realized as subrepresentations of elementary representations. The latter are induced from irreducible… Expand

320 5

From CFT to graphs

- V. Petkova, J. Zuber
- Physics
- 24 October 1995

In this paper, we pursue the discussion of the connections between rational conformal field theories (CFT) and graphs. We generalise our recent work on the relations of operator product algebra (OPA)… Expand

45 5- PDF

Dynamical derivation of vacuum operator-product expansion in Euclidean conformal quantum field theory

- V. Dobrev, V. Petkova, S. Petrova, I. T. Todorov
- Physics
- 15 February 1976

An expansion of the type $sub 0$ = $sub 0$ $sub 0$ + $Sigma$/sub chi/l C$sup 2$(chi/subl/) $Integral$ (dp) Q/sup chi/l (x$sub 1$,x$sub 2$;-p) w/sub chi/l(p) Q/sup chi//subl/(p;x$sub 3$,... x/subn/)… Expand

137 4

Clinical characteristics, treatment patterns, and socio-economic burden of COPD in Bulgaria

- M. Kamusheva, M. Dimitrova, +9 authors G. Petrova
- Medicine
- Journal of medical economics
- 23 January 2017

Abstract Background: While the impact of COPD in Western-Europe is known, data from Eastern-Europe is scarce. This study aimed to evaluate clinical characteristics, treatment patterns, and the… Expand

11 3

Determinant Formula for the Octagon Form Factor in N=4 Supersymmetric Yang-Mills Theory.

- I. Kostov, V. Petkova, D. Serban
- Mathematics, Medicine
- Physical review letters
- 12 June 2019

We present a closed expression for the octagon form factor which appears as a building block in a class of four-point correlation functions in N=4 supersymmetric Yang-Mills theory considered recently… Expand

21 3

Conformal Field Theories, Graphs and Quantum Algebras

- V. Petkova, J. Zuber
- Physics, Mathematics
- 31 August 2001

This article reviews some recent progress in our understanding of the structure of rational conformal field theories, based on ideas that originate for a large part in the work of A. Ocneanu. The… Expand

31 3- PDF