Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boundary-interior principle for microbial navigation in geometric
  confinement   When the motion of a motile cell is observed closely, it appears erratic, and
yet the combination of nonequilibrium forces and surfaces can produce striking
examples of collective organization in microbial systems. While our current
understanding is based on bulk systems or idealized geometries, it is not clear
at which length scale self-organization emerges. Here, using experiments,
analytical and numerical calculations we study the motion of motile cells under
controlled microfluidic conditions, and demonstrate that a robust topology of
probability flux loops organizes active motion even at the level of a single
cell exploring an isolated habitat. By accounting for the interplay of activity
and interfacial forces, we find that the boundary's curvature determines the
nonequilibrium probability fluxes of the motion, which can be controlled
directly. We theoretically predict a universal relation between fluxes and
global geometric properties that is directly confirmed by experiments. Our
findings open the possibility to decipher the most probable trajectories of
motile cells and may enable the design of active topological materials.

30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ