Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controlled coupling of spin-resolved quantum Hall edge states   Topologically-protected edge states are dissipationless conducting surface
states immune to impurity scattering and geometrical defects that occur in
electronic systems characterized by a bulk insulating gap. One example can be
found in a two-dimensional electron gas (2DEG) under high magnetic field in the
quantum Hall regime. Based on the coherent control of the coupling between
these protected states, several theoretical proposals for the implementation of
information processing architectures were proposed. Here we introduce and
experimentally demonstrate a new method that allows us to controllably couple
co-propagating spin-resolved edge states of a QH insulator. The scheme exploits
a spatially-periodic in-plane magnetic field that is created by an array of
Cobalt nano-magnets placed at the boundary of the 2DEG. A maximum charge/spin
transfer of about 28% is achieved at 250 mK. This result may open the way to
the realization of scalable quantum-information architectures exploiting the
spin degree of freedom of topologically-protected states.

37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas