Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hunting Mermaids in Real Space: Known Knowns, Known Unknowns and Unknown
  Unknowns   We review efforts to realise so-called mermaid (or short-ranged
attraction/long ranged repulsion) interactions in 3d real space. The repulsive
and attractive contributions to these interactions in charged colloids and
colloid-polymer mixtures, may be accurately realised, by comparing
particle-resolved studies with colloids to computer simulation. However, when
we review work where these interactions have been combined, despite early
indications of behaviour consistent with predictions, closer analysis reveals
that in the non-aqueous systems used for particle-resolved studies, the idea of
summing the attractive and repulsive components leads to wild deviations with
experiment. We suggest that the origin lies in the weak ion dissociation in
these systems with low dielectric constant solvents. Ultimately this leads even
to non-centro-symmetric interactions and a new level of complexity in these
systems.

36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int