43 citations · 150 across the 11 of their papers we have counts for
12 papers
Collective Order Decouples Boundary Selection from Macroscopic Chirality in Confined Active Matter
Néstor Sepúlveda
Can a boundary determine the direction of circulation in a collectively moving active fluid? We study chiral self-propelled particles with nematic bulk alignment, confined by walls…
Collective search-and-capture under competing assignment policies
Néstor Sepúlveda
We study a minimal lattice model of active search-and-capture in which persistent random walkers locate and irreversibly capture immobile targets through a finite-range, mutually e…
Collective phases in overdamped magnetic self-propelled spherocylinders
Francisca Guzmán-Lastra, Néstor Sepúlveda
We study the collective dynamics of self-propelled spherocylinders carrying magnetic dipole moments in two dimensions. Magnetic interactions are modeled as two opposite monopoles $…
Active Growth Layer Induced by Micromechanical Feedback Shapes Proliferating Cell Collectives
Fidel Álvarez-Murphy, Ignacio Medina, Néstor Sepúlveda +1
Proliferating cell collectives often develop an active growth layer near their boundary that regulates expansion and morphology, as observed in systems ranging from bacterial biofi…
A correspondence between the Rabi model and an Ising model with long-range interactions
Bruno Scheihing-Hitschfeld, Néstor Sepúlveda
By means of Trotter's formula, we show that transition amplitudes between a class of generalized coherent states in the Rabi model can be understood in terms of a certain Ising mod…
Accumulation and depletion of E. coli in surfaces mediated by curvature
Benjamín Pérez-Estay, María Luisa Cordero, Néstor Sepúlveda +1
Can topography be used to control bacteria accumulation? We address this question in the model system of smooth-swimming and run-and-tumble \textit{Escherichia coli} swimming near…
Macroscopic bioinspired magnetic active matter and the physical limits of magnetotaxis
Néstor Sepúlveda, Francisca Guzmán-Lastra, Miguel Carrasco +4
Magnetotactic bacteria (MTB) are endowed with an exquisite orientation mechanism allowing them to swim along the geomagnetic field lines. This mechanism consists of a chain of bio-…
Universality of active wetting transitions
Néstor Sepúlveda, Rodrigo Soto
Four on-lattice and six off-lattice models for active matter are studied numerically, showing that in contact with a wall, they display universal wetting transitions between three…
Hyperuniform states generated by a critical friction field
Gustavo Castillo, Nicolas Mujica, Nestor Sepulveda +3
Hyperuniform states are an efficient way to fill up space for disordered systems. In these states the particle distribution is disordered at the short scale but becomes increasingl…
Wetting Transitions Displayed by Persistent Active Particles
Néstor Sepúlveda, Rodrigo Soto
A lattice model for active matter is studied numerically, showing that it displays wettings transitions between three distinctive phases when in contact with an impenetrable wall.…
Coarsening and clustering in run-and-tumble dynamics with short-range exclusion
Nestor Sepulveda, Rodrigo Soto
The emergence of clustering and coarsening in crowded ensembles of self-propelled agents is studied using a lattice model in one-dimension. The persistent exclusion process, where…
Non Classical Rotational Inertia Fraction in a One Dimensional Model of Supersolid
Néstor Sepulveda, Christophe Josserand, Sergio Rica
We study the rotational inertia of a model of supersolid in the frame of the mean field Gross-Pitaevskii theory in one space dimension. We discuss the ground state of the model and…