Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mobile defects born from an energy cascade shape the locomotive behavior
  of a headless animal   The physics of behavior seeks simple descriptions of animal behavior. The
field has advanced rapidly by using techniques in low dimensional dynamics
distilled from computer vision. Yet, we still do not generally understand the
rules which shape these emergent behavioral manifolds in the face of
complicated neuro-construction -- even in the simplest of animals. In this
work, we introduce a non-neuromuscular model system which is complex enough to
teach us something new but also simple enough for us to understand. In this
simple animal, the manifolds underlying the governing dynamics are shaped and
stabilized by a physical mechanism: an active-elastic, inverse-energy cascade.
Building upon pioneering work in the field, we explore the formulation of the
governing dynamics of a polarized active elastic sheet in terms of the normal
modes of an elastic structure decorated by a polarized activity at every node.
By incorporating a torque mediated coupling physics, we show that power is
pumped from the shortest length scale up to longer length scale modes via a
combination of direct mode coupling and preferential dissipation. We use this
result to motivate the study of organismal locomotion as an emergent simplicity
governing organism-scale behavior. To master the low dimensional dynamics on
this manifold, we present a zero-transients limit study of the dynamics of +1
or vortex-like defects in the ciliary field. We show, experimentally,
numerically and analytically that these defects arise from this energy cascade
to generate long-lived, stable modes of locomotive behavior. Using a geometric
model, we can link defects to organism locomotion. We extend this framework to
study larger organisms with non-circular shape and introduce local activity
modulation for defect steering. We expect this work to inform the foundations
of organismal control of distributed actuation without muscles or neurons.

8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph