336 citations · 1k across the 12 of their papers we have counts for
12 papers
Extrapolation to nonequilibrium from coarse grained response theory
Urna Basu, Laurent Helden, Matthias Krüger
Nonlinear response theory, in contrast to linear cases, involves (dynamical) details, and this makes application to many body systems challenging. From the microscopic starting poi…
Measurement of second-order response without perturbation
Laurent Helden, Urna Basu, Matthias Krüger +1
We study the second order response functions of a colloidal particle being subjected to an anharmonic potential. Contrary to typical response measurements which require an external…
Direct measurement of thermophoretic forces
Laurent Helden, Ralf Eichhorn, Clemens Bechinger
We study the thermophoretic motion of a micron sized single colloidal particle in front of a flat wall by evanescent light scattering. To quantify thermophoretic effects we analyse…
Salt-induced changes of colloidal interactions in critical mixtures
Ursula Nellen, Julian Dietrich, Laurent Helden +4
We report on salt-dependent interaction potentials of a single charged particle suspended in a binary liquid mixture above a charged wall. For symmetric boundary conditions (BC) we…
Reply to Comment on "Influence of Noise on Force Measurements" [1012.5371]
Giovanni Volpe, Laurent Helden, Thomas Brettschneider +2
Having a priori knowledge of the force acting on a noisy system it is possible to solve the issue relative to the interpretation of multiplicative noise terms (aka Ito-Stratonovich…
Force measurement in the presence of Brownian noise: Equilibrium distribution method vs. Drift method
Thomas Brettschneider, Giovanni Volpe, Laurent Helden +2
The study of microsystems and the development of nanotechnologies require new techniques to measure piconewton and femtonewton forces at microscopic and nanoscopic scales. Amongst…