 Mail: ESPCI Paris, PSL Research University, 10 Rue Vauquelin,
75005,Paris,France.
 Email:
 ORCID



Recent:
Effective interactions and noncentral forces in hard sphere crystals
 Recent: Cavity averages
for hard spheres in the presence of polydispersity and incomplete
data
 Recent: How many modes
can be studied in colloids by correlation analysis?

 Crystallization
and sedimentation in colloids

with John
Russo , Hajime Tanaka ,
Daniel
Bonn
Mode structure from truncated correlations
 Truncated
correlations in video microscopy of colloidal solids

Use of integral equations such as \[ \int_V \frac{1}{4\pi{\bf
r}{\bf r'}} \psi({\bf r}) \; d^3{\bf r} = \Lambda \psi({\bf r'})
\] to understand experimental mode structure in a fluctuating
elastic medium
 Study of two
dimensional colloid with experimental
and theoretical groups of
U. Penn.

Anomalous dispersion in sliced colloids
Why does a colloid have the anomalous dispersion law \( \omega^2
=q \) when observed in a confocal slice? The density of states then
behaves as \(\rho(\omega) \sim \omega^3\)
 Anisotropic
elasticity and confocal microscopy
 Elastic
constants from confocal microscopy with Claire
Lemarchand, Michael
Schindler thesis in
French
 Fluctuations
and modes in a colloidal crystal with Daniel
Bonn, Antina Ghosh,
Density of states in two cuts of a colloidal
crystal.
Casimir, Lifshitz and dielectric fluctuations
 Dynamic Casimir with David Dean , BingSui Lu and Rudi Podgnornik

Influence of scale dependent dieletric constant on interactions
 Application to
Monte Carlo in fluids with Helene
Berthoumieux Showing how to go beyond approximations such as
AxelrodTeller.
 Lifshitz in two
and three dimensions
 Evaluation of
dispersion forces in general geometries with Samuela
Pasquali
 Thermal
Casimir/Lifshitz interactions discretization methods
 Generation of
thermal Casimir in Monte Carlo
 The transliteration of Лифшиц can also
be Lifschitz or Lifshits

Two disks for which the full electrodynamic
interaction is found by evaluating a functional determinant
$$F=\int_0^\infty \log ( {\det{[{\mathcal D} (\omega)])}}\frac{
d\omega}{2\pi}$$
Quantum spins and Computing
Quantum annealing appears to give a simple means of finding the
solution to difficult problems, however a first order phase
transition can lead to exponential slowdowns
 Quantum
annealing with Florent Krzakala and
Jorge Kurchan
 Quantum
optimization
 Quantum energy
gaps with Justine
Pujos

Evolution of the gap in a quantum system as a
function of coupling for various systems sizes
Multiscale Monte Carlo algorithm for LennardJones fluids
Introduce a collective update in a fluid which moves many particles
simultaneously. It leads to simultaneous equilibration on all
length scales, but requires the determinant of the transformation
as a correction in the Metropolis update rule.
 Multiscale
Monte Carlo for LennardJones fluids
 Leapfrog
algorithm with a conserved quasienergy
 Multiscale molecular dynamics
 Event Chain Monte Carlo
with Michael Faulkner, Liang Qin, Werner Krauth
 Factor field acceleration
with Ze Lei and Werner Krauth
Local electrostatics in molecular dynamics and Monte Carlo
 Recent: Convex PoissonBoltzmann equations beyond mean field
 Recent: disjoining pressure isotherm in non symmetric conditions
 Recent: Density gradiants and PoissonBoltzmann
 Recent: Asymmetric excludedvolume in electrolytes
 Recent: Fluctuations and
spectrum in dual PoissonBoltzmann theory
 Recent: KirkwoodShumaker
interactions in one dimension with Rudi
Podgornik
 Recent: Fluctuations beyond
Poisson Boltzmann theory with Zhenli Xu
 Recent: Convex functional
for PoissonBoltzmann theory of ionic solutions using
Legendre transforms to produce dual variational principles
 Recent: Legendre
transforms in electostatics with Justine Pujos
 We can use the constraint of Gauss'
law: \( \; div\;{\bf E}  \rho =0 \) to produce, local \(O(N)\)
Monte Carlo algorithms for the simulation of charged systems
 Summary of Local
electrostatics
 Metallic
and 2+1 dimensional boundary conditions with Lucas
Levrel link to Thesis in
French
 Simulating
nanoscale dielectric response with
Ralf Everaers
 Discretization
artefacts, higher order corrections in electrostatic
interpolation
 Mobility
and trail dynamics

 Comparison of
molecular dynamics and Monte Carlo for CCP2004
 Cluster
algorithms for Statphys22
with Fabien
Alet
 Molecular
dynamics, with Joerg Rottler
 Offlattice Monte
Carlo, with Joerg Rottler
 Auxiliary field
Monte Carlo for charged particles, inhomogeneous media and
PoissonBoltzmann
 An
algorithm for local Coulomb simulation, for a simple lattice
gas with Vincent
Rossetto link to thesis in
French
 Relaxation
dynamics of a local Coulomb
 Ewald
summation unpublished notes on simple optimizations for Monte
Carlo



Polarized multiple scattering
The theory of polarization in multiple scattering is very similar
to the theory of writhe in semiflexible polymers, such as DNA:
 Writhing Light
in multiple scattering
 Polarization
patterns in back scattering
 Berry Phases and
multiple scattering

Flowerlike figure from observation of polarized light in
strongly scattering sample. Fourfold symmetry from the Berry phase
of \(4 \pi\) in backscattering geometry.


Writhe geometry
Formulations of the writhe based on the local torsion, \(\tau\) can
not be used in polymer physics, one must use more global
considerations to understand the geometry
 Writhing
geometry of open DNA

Comment on DNA
elasticity
 Geometry of
writhe


A bent beam with writhe leads to rotation.

Writhe is only defined modulo \( 4 \pi \) in open
geometries


Semiflexible polymers
Anisotropic dynamics in semiflexible polymers leads to a mixture of
transverse dynamics in \( t^{3/4} \) and longitudinal dynamics in
\( t^{7/8} \).
 Anisotropic
fluctuations
 Two plateau
moduli for actin gels
 Subdiffusion
and anomalous
 Nonaffine
effects in microrheology
 Actin filaments have a persistence
length of \(10\mu\), this is much stiffer than most polymers. How
does this affect the rheology and mechanics of semidiluate
solutions? The modulus is given by \(G= \frac{kT}{\ell_e}\) where
the collision length in the tube \(\ell_e\) is close to a micron.
Uncrosslinked actin is thus rather soft.
 Dynamics
and rheology of actin solutions Hervé
Isambert
 unbinding stiff polymers



Microtubule motor constructs
 Concentration
of motors in microtubule arrays with Francois
Nedelec
 Regulation
of microtubule growth Marileen
Dogterom
 Organization of
microtubules by motors
Thomas Surrey

