66 citations · 272 across the 40 of their papers we have counts for
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String Theory has no Isotropic Solution for the Modified Einstein's Equations without the Dilaton
Christopher Frye, Costas Efthimiou
We investigate the modification to Einstein's vacuum field equations which is imposed by string theory when the dilaton field is ignored. Including the cosmological constant in all…
Stringy Corrections to the Classical Tests of General Relativity
Christopher Frye, Costas J. Efthimiou
String theory imposes modifications to Einstein's equations of classical general relativity. Consequently, we calculate the additional corrections to the classical tests: the perih…
A Mechanism for Charge Quantization
Theodore J. Allen, Costas J. Efthimiou, Donald Spector
We analyze a potential that produces background charges which are automatically quantized. This introduces a new mechanism for charge quantization, although so far it has only been…
Remarks on A_2 Toda Field Theory
S. A. Apikyan, C. J. Efthimiou
We study the Toda field theory with finite Lie algebras using an extension of the Goulian-Li technique. In this way, we show that, after integrating over the zero mode in the corre…
A Collection of Exercises in Two-Dimensional Physics, Part 1
C. J. Efthimiou, D. A. Spector
This document is an introduction to and review of two-dimensional mathematical physics. The reader is introduced to the subject matter primarily through problems, which are present…
On the Integrability of the Bukhvostov-Lipatov Model
Marco Ameduri, Costas J. Efthimiou, Bogomil Gerganov
The integrability of the Bukhvostov-Lipatov four-fermion model is investigated. It is shown that the classical model possesses a current of Lorentz spin 3, conserved both in the bu…
The Conformal Properties of Liouville Field Theory on Z_N-Riemann Surfaces
S. A. Apikyan, C. J. Efthimiou
The Liouville field theory on Z_N-Riemann surfaces is studied and it is shown that it decomposes into a Liouville field theory on the sphere and N-1 free boson theories. Also, the…
Minimal Models of CFT on Z_N-Surfaces
Samwel Apikyan, Costas Efthimiou
The conformal field theory on a Z_N-surface is studied by mapping it on the branched sphere. Using a coulomb gas formalism we construct the minimal models of the theory.
Form Factors of 2-D Integrable Models Using Radial Quantization
Costas Efthimiou
We review some ideas from a recent construction which introduced the notion of vertex operators and form factors as vacuum expectation values of related vertex operators in the spa…
Particle-Field Duality and Form Factors from Vertex Operators
Costas Efthimiou, Andre LeClair
Using a duality between the space of particles and the space of fields, we show how one can compute form factors directly in the space of fields. This introduces the notion of vert…
A Comment on the Propagator of the Radial Oscillator
C. J. Efthimiou
Using a hybrid approach, based on the recursion relations for shape invariant potentials developed by Das and Huang and a time-dependent tranformation of variables, we derive the p…