Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetry Protected Topological Phases in Spin Ladders with Two-body
  Interactions   Spin-1/2 two-legged ladders respecting inter-leg exchange symmetry and D2
spin rotation symmetry have new symmetry protected topological (SPT) phases
which are different from the Haldane phase. Three of the new SPT phases are
tx,ty,tz, which all have symmetry protected two-fold degenerate edge states on
each end of the open boundaries. However, the edge states in different phases
have different response to magnetic field. For example, the edge states in the
tz phase will be split by the magnetic field along the z-direction, but not by
the fields in the x- and y-directions. We give the Hamiltonian that realizes
each SPT phase and demonstrate a proof-of-principle quantum simulation scheme
for Hamiltonians of the t0 and tz phases based on coupled-QED-cavity ladder.

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The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn