22 citations · 49 across the 7 of their papers we have counts for
7 papers
Bath-modes quantitatively capture the nonlinear microrheology of micellar solutions
Pierre Champagnac, Clemens Bechinger, Juliana Caspers +3
Active microrheology experiments, in which a probe is driven through a complex fluid, often exhibit nonlinear responses that cannot be captured by generalized Langevin equations. M…
Identities for nonlinear memory kernels
Juliana Caspers, Matthias Krüger
Perturbing a system far away from equilibrium via a time dependent protocol can formally be described by a nonlinear Volterra series expansion. Here we derive identities for the no…
Equilibrium trajectories quantify second order violation of fluctuation dissipation theorem without need of a model
Juliana Caspers, Karthika Krishna Kumar, Clemens Bechinger +1
Quantifying and characterizing fluctuations far away from equilibrium is a challenging task. We discuss and experimentally confirm a series expansion for a driven classical system,…
Nonlinear Langevin functionals for a driven probe
Juliana Caspers, Matthias Krüger
When a probe particle immersed in a fluid with nonlinear interactions is subject to strong driving, the cumulants of the stochastic force acting on the probe are nonlinear function…
Memory-induced alignment of colloidal dumbbells
Karthika Krishna Kumar, Juliana Caspers, Félix Ginot +2
When a colloidal probe is forced through a viscoelastic fluid which is characterized by a long stress-relaxation time, the fluid is excited out of equilibrium. This is leading to a…
How are mobility and friction related in viscoelastic fluids?
Juliana Caspers, Nikolas Ditz, Karthika Krishna Kumar +4
The motion of a colloidal probe in a viscoelastic fluid is described by friction or mobility, depending on whether the probe is moving with a velocity or feeling a force. While the…
Recoil experiments determine the eigenmodes of viscoelastic fluids
Félix Ginot, Juliana Caspers, Luis Frieder Reinalter +3
We experimentally investigate the recoil dynamics of a colloidal probe particle after shearing it with constant velocity through a viscoelastic fluid. The recoil displays two disti…