Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement engineering and topological protection by discrete-time
  quantum walks   Discrete-time quantum walks (QWs) represent robust and versatile platforms
for the controlled engineering of single particle quantum dynamics, and have
attracted special attention due to their algorithmic applications in quantum
information science. Even in their simplest 1D architectures, they display
complex topological phenomena, which can be employed in the systematic study of
topological quantum phase transitions [1]. Due to the exponential scaling in
the number of resources required, most experimental realizations of QWs up to
date have been limited to single particles, with only a few implementations
involving correlated quantum pairs. In this article we study applications of
quantum walks in the controlled dynamical engineering of entanglement in
bipartite bosonic systems. We show that quantum walks can be employed in the
transition from mode entanglement, where indistinguishability of the quantum
particles plays a key role, to the standard type of entanglement associated
with distinguishable particles. We also show that, by carefully tailoring the
steps in the QWs, as well as the initial state for the quantum walker, it is
possible to preserve the entanglement content by topological protection. The
underlying mechanism that allows for the possibility of both entanglement
engineering and entanglement protection is the strong "spin-orbit" coupling
induced by the QW. We anticipate that the results reported here can be employed
for the controlled emulation of quantum correlations in topological phases.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph