Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong-coupling theory of counterions with hard cores between
  symmetrically charged walls   By a combination of Monte Carlo simulations and analytical calculations, we
investigate the effective interactions between highly charged planar
interfaces, neutralized by mobile counterions (salt-free system). While most
previous analysis have focused on point-like counterions, we treat them as
charged hard spheres. We thus work out the fate of like-charge attraction when
steric effects are at work. The analytical approach partitions counterions in
two sub-populations, one for each plate, and integrates out one sub-population
to derive an effective Hamiltonian for the remaining one. The effective
Hamiltonian features plaquette four-particle interactions, and it is worked out
by computing a Gibbs-Bogoliubov inequality for the free energy. At the root of
the treatment is the fact that under strong electrostatic coupling, the system
of charges forms an ordered arrangement, that can be affected by steric
interactions. Fluctuations around the reference positions are accounted for. To
dominant order at high coupling, it is found that steric effects do not
significantly affect the interplate effective pressure, apart at small
distances where hard sphere overlap are unavoidable, and thus rule out
configurations.

29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph