Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ground-state properties of the hydrogen chain: insulator-to-metal
  transition, dimerization, and magnetic phases   Accurate and predictive computations of the quantum-mechanical behavior of
many interacting electrons in realistic atomic environments are critical for
the theoretical design of materials with desired properties, and require
solving the grand-challenge problem of the many-electron Schrodinger equation.
An infinite chain of equispaced hydrogen atoms is perhaps the simplest
realistic model for a bulk material, embodying several central themes of modern
condensed matter physics and chemistry, while retaining a connection to the
paradigmatic Hubbard model. Here we report a combined application of
cutting-edge computational methods to determine the properties of the hydrogen
chain in its quantum-mechanical ground state. Varying the separation between
the nuclei leads to a rich phase diagram, including a Mott phase with quasi
long-range antiferromagnetic order, electron density dimerization with
power-law correlations, an insulator-to-metal transition and an intricate set
of intertwined magnetic orders.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph