Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bidimensional fluid system with competing interactions   In this paper we present a study of pattern formation in bidimensional
systems with competing short-range attractive and long-range repulsive
interactions. The interaction parameters are chosen in such a way to analyse
two different situations: the spontaneous pattern formation due to the presence
of strong competing interactions on different length scales and the pattern
formation as a response to an external modulating potential when the system is
close to its Lifshitz point. We compare different Monte Carlo techniques
showing that Parallel Tempering technique represents a promising approach to
study such systems and we present detailed results for the specific heat and
the structural properties. We also present random phase approximation
predictions about the spontaneous pattern formation (or microphase separation),
as well as linear response theory predictions about the induced pattern
formation due to the presence of an external modulating field. In particular we
observe that the response of our systems to external fields is much stronger
compared to the response of a Lennard-Jones fluid.

25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex