14 citations · 61 across the 16 of their papers we have counts for
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A misleading Wilsonian fixed point
Jean Alexandre
We exhibit here, for a scalar theory, an apparently non-trivial Wilsonian fixed point, which surprisingly describes a free theory. This modest note is an observation which can be o…
A new non-perturbative time-dependent string configuration
Jean Alexandre
A time-dependent bosonic string configuration is discussed, in graviton and dilaton backgrounds, leading to Weyl-symmetry beta-functions which are homogeneous in X^0, to any order…
Antisymmetric-Tensor and Electromagnetic effects in an alpha'-non-perturbative Four-Dimensional String Cosmology
Jean Alexandre, Nick E. Mavromatos, Dylan Tanner
Starting from an exact (in the Regge slope alpha') functional method for a bosonic stringy sigma-model, we investigate four-dimensional cosmological string solutions in graviton, d…
Path integral quantization of scalar fluctuations above a kink
Jean Alexandre, Konstantinos Farakos
We quantize scalar fluctuations in 1+1 dimensions above a classical background kink. The properties of the effective action for the corresponding classical field are studied with a…
Can strings live in four dimensions?
Jean Alexandre, Nikolaos E. Mavromatos
Using a novel, non-perturbative, time-dependent string configuration derived in [1], we present here an argument which selects new critical dimensions for the target space time of…