Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic polarization of single nuclear spins by optical pumping of NV
  color centers in diamond at room temperature   We report a versatile method to efficiently polarize single nuclear spins in
diamond, which is based on optical pumping of a single NV color center and
mediated by a level-anti crossing in its excited state. A nuclear spin
polarization higher than 98% is achieved at room temperature for the 15N
nuclear spin associated to the NV center, corresponding to $\mu$K effective
nuclear spin temperature. We then show simultaneous deterministic
initialization of two nuclear spins (13C and 15N) in close vicinity to a NV
defect. Such robust control of nuclear spin states is a key ingredient for
further scaling up of nuclear-spin based quantum registers in diamond.

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The categories of this paper are: adap-org
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex