25 citations · 117 across the 17 of their papers we have counts for
17 papers
Large scale behavior in the Kuramoto-Sivashinsky equation: The Schwinger-Dyson route
Olivier Coquand
The present paper is a study of the large scale properties of the Kuramoto-Sivashinsky equation. By using a Schwinger-Dyson framework, we aim to provide a proof that the only solut…
Getting rid of the ghosts: a toy-model of membrane melting
Olivier Coquand
The theory of thermal fluctuations in crystalline membranes is put under scrutiny. In particular, the two critical regimes of the renormalisation group diagram, which are often lef…
Direct Boltzmann inversion method from particle configurations at arbitrary state points
Olivier Coquand, Davide Paolino, Ludovic Berthier
We introduce a direct Boltzmann inversion method to infer the interaction potential in particle systems using as input particle configurations generated at an arbitrary state point…
The effect of water on granular liquid flows: from debris to mud flows
O. Coquand
In this work, we show how the rheology of granular suspensions can be related to the properties of the fluctuations of the velocity field inside the medium. In particular, effectiv…
Energy Cascades in Driven Granular Liquids : A new Universality Class? I : Model and Symmetries
O. Coquand
This article deals with the existence and scaling of an energy cascade in steady granular liquid flows between the scale at which the system is forced and the scale at which it dis…
Rheology of granular liquids in extensional flows: Beyond the -law
Olivier Coquand, Matthias Sperl
The Granular Integration Through Transients (GITT) formalism gives a theoretical description of the rheology of moderately dense granular flows and suspensions. In this work, we ex…
Wrinkling transition in quenched disordered membranes at two loops
O. Coquand, D. Mouhanna
One investigates the flat phase of quenched disordered polymerized membranes by means of a two-loop, weak-coupling computation performed near their upper critical dimension $D_{uc}…
Granular rheology: a tale of three time scales
Olivier Coquand, Wolf Till Kranz, Matthias Sperl
We adapt statistical models of the physics of complex fluids to study the rheology of granular liquids. This allows us to provide laws of granular rheology based on first principle…
Integration through transients approach to the rheology
Olivier Coquand, Matthias Sperl, Till Kranz
This work generalises the granular integration through transients formalism introduced by Kranz et al. [Phys. Rev. Lett. 121, 148002 (2018)] to the determination of the pressure. W…
The flat phase of polymerized membranes at two-loop order
O. Coquand, D. Mouhanna, S. Teber
We investigate two complementary field-theoretical models describing the flat phase of polymerized - phantom - membranes by means of a two-loop, weak-coupling, perturbative approac…
Temperature Expansions in the Square-Shoulder Fluid I: the Wiener-Hopf Function
O. Coquand, M. Sperl
We investigate the spatial structure of dense square-shoulder fluids. To this end we derive analytical perturbative solutions of the Ornstein-Zernike equation in the low- and high-…
Universal behaviors in the wrinkling transition of disordered membranes
O. Coquand, K. Essafi, J. -P. Kownacki +1
The wrinkling transition experimentally identified by Mutz et al. [Phys. Rev. Lett. 67, 923 (1991)] and then thoroughly studied by Chaieb et al. [Phys. Rev. Lett. 96, 078101 (2006)…
Spontaneous symmetry breaking and the flat phase of crystalline membranes
O. Coquand
Crystalline membranes are one of the rare examples of bidimensional systems in which long-range order can stabilise an ordered phase in the thermodynamic limit. By a careful analys…
A glassy phase in quenched disordered graphene and crystalline membranes
O. Coquand, K. Essafi, J. -P. Kownacki +1
We investigate the flat phase of -dimensional crystalline membranes embedded in a -dimensional space and submitted to both metric and curvature quenched disorders using a non…
The flat phase of quantum polymerized membranes
O. Coquand, D. Mouhanna
We investigate the flat phase of quantum polymerized phantom membranes by means of a nonperturbative renormalization group approach. We first implement this formalism for general q…
Refractive properties of graphene in a medium-strong external magnetic field
Olivier Coquand, Bruno Machet
1-loop quantum corrections are shown to induce large effects on the refraction index inside a graphene strip in the presence of an external magnetic field orthogonal to it.…
From Quantum Field Theory to Nano-Optics : Refractive Properties of Graphene in a Medium-Strong Magnetic field
Olivier Coquand, Bruno Machet
1-loop quantum corrections are shown to induce large effects on the refraction index n inside a graphene strip in the presence of an external magnetic field B orthogonal to it. To…