Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards a room-temperature spin quantum bus in diamond via optical spin
  injection, transport and detection   Diamond is a proven solid-state platform for spin-based quantum technology.
The nitrogen-vacancy (NV) center in diamond has been used to realize
small-scale quantum information processing (QIP) and quantum sensing under
ambient conditions. A major barrier in the development of large-scale QIP in
diamond is the connection of NV spin registers by a quantum bus at room
temperature. Given that diamond is expected to be an ideal spin transport
material, the coherent transport of spin directly between the spin registers
offers a potential solution. Yet, there has been no demonstration of spin
transport in diamond due to difficulties in achieving spin injection and
detection via conventional methods. Here, we exploit detailed knowledge of the
paramagnetic defects in diamond to identify novel mechanisms to achieve spin
injection, transport and detection in diamond at room temperature. Having
identified these mechanisms, we explore how they may be combined to realise an
on-chip spin quantum bus.

10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess