69 citations · 110 across the 6 of their papers we have counts for
6 papers
Full Counting Statistics of Quantum Point Contact with Time-dependent Transparency
Jin Zhang, Y. Sherkunov, N. d'Ambrumenil +1
We analyse the zero temperature Full Counting Statistics (FCS) for the charge transfer across a biased tunnel junction. We find the FCS from the eigenvalues of the density matrix o…
Breakdown of Migdal--Eliashberg theory via catastrophic vertex divergence at low phonon frequency
J. P. Hague, N. d'Ambrumenil
We investigate the applicability of Migdal--Eliashberg (ME) theory by revisiting Migdal's analysis within the dynamical mean-field theory framework. First, we compute spectral func…
Analytical Results for a Hole in an Antiferromagnet
Y. M. Li, N. d'Ambrumenil, L. Yu +1
The Green's function for a hole moving in an antiferromagnet is derived analytically in the long-wavelength limit. We find that the infrared divergence is eliminated in two and hig…
Scaling Law for a Magnetic Impurity Model with Two-Body Hybridization
Yue Yu, Yanmin Li, Nick d'Ambrumenil
We consider a magnetic impurity coupled to the hybridizing and screening channels of a conduction band. The model is solved in the framework of poor man's scaling and Cardy's gener…
Stability and effective masses of composite-fermions in the first and second Landau Level
R. Morf, N. d'Ambrumenil
We propose a measure of the stability of composite fermions (CF's) at even-denominator Landau-level filling fractions. Assuming Landau-level mixing effects are not strong, we show…
A partition functional and thermodynamic properties of the infinite-dimensional Hubbard model
Y. M. Li, N. d'Ambrumenil
An approximate partition functional is derived for the infinite-dimensional Hubbard model. This functional naturally includes the exact solution of the Falicov-Kimball model as a s…