Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological bound states of a quantum walk with cold atoms   We suggest a method for engineering a quantum walk, with cold atoms as
walkers, which presents topologically non-trivial properties. We derive the
phase diagram, and show that we are able to produce a boundary between
topologically distinct phases using the finite beam width of the applied
lasers. A topologically protected bound state can then be observed, which is
pinned to the interface and is robust to perturbations. We show that it is
possible to identify this bound state by averaging over spin sensitive measures
of the atom's position, based on the spin distribution that these states
display. Interestingly, there exists a parameter regime in which our system
maps on to the Creutz ladder.

5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math