Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum phase transition in a far from equilibrium steady state of XY
  spin chain   Using quantization in the Fock space of operators we compute the
non-equilibrium steady state in an open Heisenberg XY spin 1/2 chain of finite
but large size coupled to Markovian baths at its ends. Numerical and
theoretical evidence is given for a far from equilibrium quantum phase
transition with spontaneous emergence of long-range order in spin-spin
correlation functions, characterized by a transition from saturation to linear
growth with the size of the entanglement entropy in operator space.

16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom