Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of strong and tunable light-induced dipole-dipole
  interactions between optically levitated nanoparticles   Arrays of optically trapped nanoparticles have emerged as a promising
platform for the study of complex non-equilibrium phenomena. Analogous to
atomic many-body systems, one of the crucial ingredients is the ability to
precisely control the interactions between particles. However, the optical
interactions studied thus far only provide conservative optical binding forces
of limited tunability. Here we demonstrate a coupling mechanism that is orders
of magnitude stronger and has new qualitative features. These effects arise
from the previously unexplored phase coherence between the optical fields that
drive the light-induced dipole-dipole interaction. In addition, polarization
control allows us to observe electrostatic coupling between charged particles
in the array. Our results pave the way for a fully programmable many-body
system of interacting nanoparticles with tunable dissipative and nonreciprocal
interactions, which are instrumental for exploring entanglement and topological
phases in arrays of levitated nanoparticles.

8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs