Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Eigenvalue Measurement of Topologically Protected Edge states in
  Split-Step Quantum Walks   We study topological phenomena of quantum walks by implementing a novel
protocol that extends the range of accessible properties to the eigenvalues of
the walk operator. To this end, we experimentally realise for the first time a
split-step quantum walk with decoupling, which allows for investigating the
effect of a bulk-boundary while realising only a single bulk configuration. We
approximate the symmetry protected edge states with high similarities and read
out the phase relative to a reference for all modes. In this way we observe
eigenvalues which are distinguished by the presence or absence of sign flips
between steps. Furthermore, the results show that investigating a bulk-boundary
with a single bulk is experimentally feasible when decoupling the walk
beforehand.

37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg