275 citations · 513 across the 14 of their papers we have counts for
13 papers
Towards non-parametric fiber-specific relaxometry in the human brain
A. Reymbaut, J. Critchley, G. Durighel +4
Purpose: To estimate fiber-specific values, i.e. proxies for myelin content, in heterogeneous brain tissue. Methods: A diffusion- correlation experiment was carried out…
Matrix moments of the diffusion tensor distribution
A. Reymbaut
Purpose: To facilitate the implementation/validation of signal representations and models using parametric matrix-variate distributions to approximate the diffusion tensor distribu…
Resolving orientation-specific diffusion-relaxation features via Monte-Carlo density-peak clustering in heterogeneous brain tissue
A. Reymbaut, J. P. de Almeida Martins, C. M. W. Tax +3
Characterizing the properties and orientations of sub-voxel fiber populations, although essential to study white-matter architecture, microstructure and connectivity, remains one o…
Magic DIAMOND: Multi-Fascicle Diffusion Compartment Imaging with Tensor Distribution Modeling and Tensor-Valued Diffusion Encoding
A. Reymbaut, A. Valcourt Caron, G. Gilbert +5
Diffusion tensor imaging provides increased sensitivity to microstructural tissue changes compared to conventional anatomical imaging but also presents limited specificity. To tack…
Mott transition and high-temperature crossovers at half-filling
A. Reymbaut, M. Boulay, L. Fratino +4
The interaction-driven Mott transition in the half-filled Hubbard model is a first-order phase transition that terminates at a critical point in the t…
Advanced encoding methods in diffusion MRI
Alexis Reymbaut, Maxime Descoteaux
Discovering a new field is not usually an easy process, especially when you choose magnetic resonance imaging (MRI). MRI is one of the few non-invasive medical procedures, if not t…
Pseudogap, van Hove Singularity, Maximum in Entropy and Specific Heat for Hole-Doped Mott Insulators
A. Reymbaut, S. Bergeron, R. Garioud +4
The first indication of a pseudogap in cuprates came from a sudden decrease of NMR Knight shift at a doping-dependent temperature . Since then, experiments have found phase…
Bad metallic transport in a cold atom Fermi-Hubbard system
Peter T. Brown, Debayan Mitra, Elmer Guardado-Sanchez +9
Charge transport is a revealing probe of the quantum properties of materials. Strong interactions can blur charge carriers resulting in a poorly understood "quantum soup". Here we…
Maximum entropy analytic continuation for frequency-dependent transport coefficients with non-positive spectral weight
A. Reymbaut, A. -M. Gagnon, D. Bergeron +1
The computation of transport coefficients, even in linear response, is a major challenge for theoretical methods that rely on analytic continuation of correlations functions obtain…
Mott transition and magnetism on the anisotropic triangular lattice
S. Acheche, A. Reymbaut, M. Charlebois +2
Spin-liquid behavior was recently suggested experimentally in the moderately one-dimensional organic compound -H(Cat-EDT-TTF). This compound can be modeled by the one-ba…
Antagonistic effects of nearest-neighbor repulsion on the superconducting pairing dynamics in the doped Mott insulator regime
A. Reymbaut, M. Charlebois, M. Fellous Asiani +4
The nearest-neighbor superexchange-mediated mechanism for d_{x^2-y^2}-wave superconductivity in the one-band Hubbard model faces the challenge that nearest-neighbor Coulomb repulsi…
Maximum Entropy Analytic Continuation for Spectral Functions with Non-Positive Spectral Weight
A. Reymbaut, D. Bergeron, A. -M. S. Tremblay
Information about the pairing mechanism for superconductivity is contained in the spectral weight for the anomalous (Gorkov) Green function. In the most general case, this spectral…
The convex hull for a random acceleration process in two dimensions
Alexis Reymbaut, Satya N. Majumdar, Alberto Rosso
We compute exactly the mean perimeter <L(T)> and the mean area <A(T)> of the convex hull of a random acceleration process of duration T in two dimensions. We use an exact mapping t…