Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin decoherence and electron spin bath noise of a nitrogen-vacancy
  center in diamond   We theoretically investigate spin decoherence of a single nitrogen-vacancy
(NV) center in diamond. Using the spin coherent state P-representation method,
coherence evolution of the NV center surrounded by nitrogen electron spins (N)
is simulated. We find that spin decoherence time as well as free-induction
decay of the NV center depend on the spatial configuration of N spins. Both the
spin decoherence rate (1/T2) and dephasing rate (1/T2*) of the NV center
increase linearly with the concentration of the N spins. Using the
P-representation method, we also demonstrate extracting noise spectrum of the N
spin bath, which will provide promising pathways for designing an optimum pulse
sequence to suppress the decoherence in diamond.

1
The categories of this paper are: cs
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
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The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess