Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confinement and critical regime in doped frustrated quasi-one
  dimensional magnets   Ground state and finite temperature properties of a system of coupled
frustrated and/or dimerized spin-1/2 chains modeling e.g. the CuGeO$_3$
compound are reviewed. Special emphasis is put on the investigation of the role
of impurity doping. A c hain-mean field computation combining exact
diagonalisations of the chain hamiltonians together with a mean field treatment
of the weak interchain couplings is performed in order to map the microscopic
model onto a low-energy effective model. The latter descr ibes a 2-dimensional
system of effective spin-1/2 local moments interacting by spacially anisotropic
long range spin exchange interactions. An extensive study of this effective
model is performed by Stocastic Series Expansion Quantum Monte Carlo for a wide
range of temperatures and impurity concentrations. Interesting scaling
behaviors of the uniform and staggered spin susceptibilities (above a small
ordering Neel temperature due to a residual 3D coupling) can be interpreted in
terms of the formation of large clusters of correlated spins carrying a finite
magnetization. Such results are reproduced satisfactorily by a new Real Space
RG enabling to deal with long range interactions in two-dimensions

8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph