17 papers
Strong coupling resistivity in the Kondo model
F. Lesage, H. Saleur
By applying methods of integrable quantum field theory to the Kondo problem, we develop a systematic perturbation expansion near the IR (strong coupling) fixed point. This requires…
Boundary flows in minimal models
F. Lesage, H. Saleur, P. Simonetti
We discuss in this paper the behaviour of minimal models of conformal theory perturbed by the operator at the boundary. Using the RSOS restriction of the sine-Gordon model…
Boundary conditions changing operators in non conformal theories
F. Lesage, H. Saleur
Boundary conditions changing operators have played an important role in conformal field theory. Here, we study their equivalent in the case where a mass scale is introduced, in an…
Boundary interactions changing operators and dynamical correlations in quantum impurity problems
F. Lesage, H. Saleur
Recent developments have made possible the computation of equilibrium dynamical correlators in quantum impurity problems. In many situations however, one is rather interested in co…
Tunneling in quantum wires II: A new line of IR fixed points
F. Lesage, H. Saleur, P. Simonetti
In a previous paper, we showed that the problem of tunneling in quantum wires was integrable in the isotropic case . In the present work, we continue the exploration of the…
The Maxwell-Bloch Theory in Quantum Optics and the Kondo Model
A. Leclair, F. Lesage, S. Lukyanov +1
In this letter, the problem of radiation in a fiber geometry interacting with a two level atom is mapped onto the anisotropic Kondo model. Thermodynamical and dynamical properties…