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Hydrodynamic Attraction and Hindered Diffusion Govern First-passage Times of Swimming Microorganisms
Yanis Baouche, Magali Le Goff, Thomas Franosch +1
The motion of microorganisms in their natural habitat is strongly influenced by their propulsion mechanisms, geometrical constraints, and random fluctuations. Here, we study numeri…
First-passage-time statistics of active Brownian particles: A perturbative approach
Yanis Baouche, Magali Le Goff, Christina Kurzthaler +1
We study the first-passage-time (FPT) properties of active Brownian particles to reach an absorbing wall in two dimensions. Employing a perturbation approach we obtain exact analyt…
Intermediate scattering function of a gravitactic circle swimmer
Regina Rusch, Oleksandr Chepizhko, Thomas Franosch
We analyze gravitaxis of a Brownian circle swimmer by deriving and characterizing analytically the experimentally measurable intermediate scattering function (ISF). To solve the as…
Thermodynamic properties of quasi-one-dimensional fluids
Thomas Franosch, Rolf Schilling
We calculate thermodynamic and structural quantities of a fluid of hard spheres of diameter in a quasi-one-dimensional pore with accessible pore width smaller than by…
Active Brownian particle under stochastic orientational resetting
Yanis Baouche, Thomas Franosch, Matthias Meiners +1
We employ renewal processes to characterize the spatiotemporal dynamics of an active Brownian particle under stochastic orientational resetting. By computing the experimentally acc…
Learning how to find targets in the micro-world: The case of intermittent active Brownian particles
Michele Caraglio, Harpreet Kaur, Lukas J. Fiderer +4
Finding the best strategy to minimize the time needed to find a given target is a crucial task both in nature and in reaching decisive technological advances. By considering learni…
Adaptive active Brownian particles searching for targets of unknown positions
Harpreet Kaur, Thomas Franosch, Michele Caraglio
Developing behavioral policies designed to efficiently solve target-search problems is a crucial issue both in nature and in the nanotechnology of the 21st century. Here, we charac…
Computer Simulations and Mode-Coupling Theory of Glass-Forming Confined Hard-Sphere Fluids
Gerhard Jung, Thomas Franosch
We present mode-coupling theory (MCT) results for densely packed hard-sphere fluids confined between two parallel walls and compare them quantitatively to computer simulations. The…
Thermophoretic motion of a charged single colloidal particle
Daniel B. Mayer, Dieter Braun, Thomas Franosch
We calculate the thermophoretic drift of a charged single colloidal particle with hydrodynamically slipping surface immersed in an electrolyte solution in response to a small tempe…
Characterization and Control of the Run-and-Tumble Dynamics of {\it Escherichia Coli}
Christina Kurzthaler, Yongfeng Zhao, Nan Zhou +8
We characterize the full spatiotemporal gait of populations of swimming {\it Escherichia coli} using renewal processes to analyze the measurements of intermediate scattering functi…
Analytic Solution of an Active Brownian Particle in a Harmonic Well
Michele Caraglio, Thomas Franosch
We provide an analytical solution for the time-dependent Fokker-Planck equation for a two-dimensional active Brownian particle trapped in an isotropic harmonic potential. Using the…
Crowding-Enhanced Diffusion: An Exact Theory for Highly Entangled Self-Propelled Stiff Filaments
Suvendu Mandal, Christina Kurzthaler, Thomas Franosch +1
We study a strongly interacting crowded system of self-propelled stiff filaments by event-driven Brownian dynamics simulations and an analytical theory to elucidate the intricate i…
Structural properties of liquids in extreme confinement
Gerhard Jung, Thomas Franosch
We simulate a hard-sphere liquid in confined geometry where the separation of the two parallel, hard walls is smaller than two particle diameters. By systematically reducing the wa…
Tagged-particle dynamics in confined colloidal liquids
Gerhard Jung, Lukas Schrack, Thomas Franosch
We present numerical results for the tagged-particle dynamics by solving the mode-coupling theory in confined geometry for colloidal liquids (cMCT). We show that neither the micros…
Nonergodicity parameters of confined hard-sphere glasses
Suvendu Mandal, Simon Lang, Vitalie Boţan +1
Within a recently developed mode-coupling theory for fluids confined to a slit we elaborate numerical results for the long-time limits of suitably generalized intermediate scatteri…
Tagged-particle motion in quasi-confined colloidal hard-sphere liquids
Lukas Schrack, Charlotte F. Petersen, Michele Caraglio +2
We investigate the tagged-particle motion in a strongly interacting quasi-confined liquid using periodic boundary conditions along the confining direction. Within a mode-coupling t…
Optimal navigation strategy of active Brownian particles in target-search problems
Luigi Zanovello, Pietro Faccioli, Thomas Franosch +1
We investigate exploration patterns of a microswimmer, modeled as an active Brownian particle, searching for a target region located in a well of an energy landscape and separated…
Non-monotonic effect of confinement on the glass transition
Fathollah Varnik, Thomas Franosch
The relaxation dynamics of glass forming liquids and their structure are influenced in the vicinity of confining walls. In view of the great potential of this effect for applicatio…
Time-dependent active microrheology in dilute colloidal suspensions
Sebastian Leitmann, Suvendu Mandal, Matthias Fuchs +2
In a microrheological set-up a single probe particle immersed in a complex fluid is exposed to a strong external force driving the system out of equilibrium. Here, we elaborate ana…
Two-dimensional Brownian motion of anisotropic dimers
Daniel B. Mayer, Erick Sarmiento-Gómez, Manuel A. Escobedo-Sánchez +4
We study the 2D motion of colloidal dimers by single-particle tracking and compare the experimental observations obtained by bright-field microscopy to theoretical predictions for…
An improved integration scheme for Mode-coupling-theory equations
Michele Caraglio, Lukas Schrack, Gerhard Jung +1
Within the mode-coupling theory (MCT) of the glass transition, we reconsider the numerical schemes to evaluate the MCT functional. Here we propose nonuniform discretizations of the…
Target search of active agents crossing high energy barriers
Luigi Zanovello, Michele Caraglio, Thomas Franosch +1
Target search by active agents in rugged energy landscapes has remained a challenge because standard enhanced sampling methods do not apply to irreversible dynamics. We overcome th…
Dynamical properties of densely packed confined hard-sphere fluids
Gerhard Jung, Michele Caraglio, Lukas Schrack +1
Numerical solutions of the mode-coupling theory (MCT) equations for a hard-sphere fluid confined between two parallel hard walls are elaborated. The governing equations feature mul…
Anomalous transport in the soft-sphere Lorentz model
Charlotte F. Petersen, Thomas Franosch
The sensitivity of anomalous transport in crowded media to the form of the inter-particle interactions is investigated through computer simulations. We extend the highly simplified…