Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological to magnetically ordered quantum phase transition in
  antiferromagnetic spin ladders with long-range interactions   We study a generalized quantum spin ladder with staggered long range
interactions that decay as a power-law with exponent $\alpha$. Using large
scale quantum Monte Carlo (QMC) and density matrix renormalization group (DMRG)
simulations, we show that this model undergoes a transition from a rung-dimer
phase characterized by a non-local string order parameter, to a symmetry broken
N\'eel phase. We find evidence that the transition is second order. In the
magnetically ordered phase, the spectrum exhibits gapless modes, while
excitations in the gapped phase are well described in terms of triplons --
bound states of spinons across the legs. We obtain the momentum resolved spin
dynamic structure factor numerically and find a well defined triplon band that
evolves into a gapless magnon dispersion across the transition. We further
discuss the possibility of deconfined criticality in this model.

30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph