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Matthieu Wyart

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Publications associées (66)

Theory for the density of interacting quasilocalized modes in amorphous solids

Marko Popovic, Matthieu Wyart, Wencheng Ji, Thomas Willem Jan de Geus

Quasilocalized modes appear in the vibrational spectrum of amorphous solids at low frequency. Though never formalized, these modes are believed to have a close relationship with other important local excitations, including shear transformations and two-lev ...

AMER PHYSICAL SOC2019

Allostery in Its Many Disguises: From Theory to Applications

Jingshi Li, Giulia Palermo, Matthieu Wyart, Riccardo Ravasio, Carolina Brito Carvalho dos Santos, Jing Li

Allosteric regulation plays an important role in many biological processes, such as signal transduction, transcriptional regulation, andmetabolism. Allostery is rooted in the fundamental physical properties of macromolecular systems, but its underlying mec ...

CELL PRESS2019

Mechanics of Allostery: Contrasting the Induced Fit and Population Shift Scenarios

Solange Marie Flatt, Matthieu Wyart, Stefano Zamuner, Riccardo Ravasio, Carolina Brito Carvalho dos Santos

In allosteric proteins, binding a ligand can affect function at a distant location, for example, by changing the binding affinity of a substrate at the active site. The induced fit and population shift models, which differ by the assumed number of stable c ...

CELL PRESS2019

Microscopic processes controlling the Herschel-Bulkley exponent

Matthieu Wyart, Jie Lin

2018

Principles for Optimal Cooperativity in Allosteric Materials

Matthieu Wyart, Riccardo Ravasio, Carolina Brito Carvalho dos Santos

2018

Shear fronts in shear-thickening suspensions

Matthieu Wyart

2018

Theory for Swap Acceleration near the Glass and Jamming Transitions for Continuously Polydisperse Particles

Matthieu Wyart, Carolina Brito Carvalho dos Santos

American Physical Society2018

Universality of jamming of nonspherical particles

Matthieu Wyart, Carolina Brito Carvalho dos Santos

Amorphous packings of nonspherical particles such as ellipsoids and spherocylinders are known to be hypostatic: The number of mechanical contacts between particles is smaller than the number of degrees of freedom, thus violating Maxwell's mechanical stabil ...

National Academy of Sciences2018

Spatial structure of quasilocalized vibrations in nearly jammed amorphous solids

Matthieu Wyart

The low-temperature properties of amorphous solids are widely believed to be controlled by the low-frequency quasilocalized modes. However, what governs their spatial structure and density is unclear. We study these questions numerically in very large syst ...

AMER PHYSICAL SOC2018

Elastoplastic description of sudden failure in athermal amorphous materials during quasistatic loading

Marko Popovic, Matthieu Wyart, Thomas Willem Jan de Geus

The response of amorphous materials to an applied strain can be continuous or instead discontinuous if the initial configuration is very stable. We study theoretically how such a stress drop emerges as the system's initial stability is increased. We show t ...

AMER PHYSICAL SOC2018

Effect of friction on dense suspension flows of hard particles

Eric DeGiuli, Matthieu Wyart

We use numerical simulations to study the effect of particle friction on suspension flows of non-Brownian hard particles. By systematically varying the microscopic friction coefficient mu(p) and the viscous number J, we build a phase diagram that identifie ...

Amer Physical Soc2017

Scaling description of non-local rheology

Matthieu Wyart, Jie Lin

The plastic flow of amorphous materials displays non-local effects, characterized by a cooperativity length scale xi. We argue that these effects enter in the more general description of surface phenomena near critical points. Using this approach, we obtai ...

Royal Society of Chemistry2017

Architecture and coevolution of allosteric materials

Matthieu Wyart, Riccardo Ravasio, Carolina Brito Carvalho dos Santos

We introduce a numerical scheme to evolve functional elastic materials that can accomplish a specified mechanical task. In this scheme, the number of solutions, their spatial architectures, and the correlations among them can be computed. As an example, we ...

National Academy of Sciences2017

Does a Growing Static Length Scale Control the Glass Transition?

Matthieu Wyart

Several theories of the glass transition propose that the structural relaxation time tau(alpha) is controlled by a growing static length scale. that is determined by the free energy landscape but not by the local dynamic rules governing its exploration. We ...

American Physical Society2017

Friction law and hysteresis in granular materials

Eric DeGiuli, Matthieu Wyart

The macroscopic friction of particulate materials often weakens as the flow rate is increased, leading to potentially disastrous intermittent phenomena including earthquakes and landslides. We theoretically and numerically study this phenomenon in simple g ...

National Academy of Sciences2017

Scale-free channeling patterns near the onset of erosion of sheared granular beds

Matthieu Wyart

Erosion shapes our landscape and occurs when a sufficient shear stress is exerted by a fluid on a sedimented layer. What controls erosion at a microscopic level remains debated, especially near the threshold forcing where it stops. Here we study, experimen ...

Natl Acad Sciences2016

Phase diagram for inertial granular flows

Eric DeGiuli, Matthieu Wyart

Flows of hard granular materials depend strongly on the interparticle friction coefficient mu(p) and on the inertial number I, which characterizes proximity to the jamming transition where flow stops. Guided by numerical simulations, we derive the phase di ...

2016

Unsteady flow and particle migration in dense, non-Brownian suspensions

Matthieu Wyart

We present experimental results on dense corn-starch suspensions as examples of non-Brownian, nearly hard particles that undergo continuous and discontinuous shear thickening (DST) at intermediate and high densities, respectively. Our results offer strong ...

Journal Rheology Amer Inst Physics2016

Effect of particle collisions in dense suspension flows

Matthieu Wyart

We study nonlocal effects associated with particle collisions in dense suspension flows, in the context of the Affine Solvent Model, known to capture various aspects of the jamming transition. We show that an individual collision changes significantly the ...

Amer Physical Soc2016

Evidence for Marginal Stability in Emulsions

Matthieu Wyart, Jie Lin

We report the first measurements of the effect of pressure on vibrational modes in emulsions, which serve as a model for soft frictionless spheres at zero temperature. As a function of the applied pressure, we find that the density of states D(omega) exhib ...

American Physical Society2016

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