Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical spin initialization of spin-3/2 silicon vacancy centers in
  6H-SiC at room temperature   Silicon vacancies in silicon carbide have been proposed as an alternative to
nitrogen vacancy centers in diamonds for spintronics and quantum technologies.
An important precondition for these applications is the initialization of the
qubits into a specific quantum state. In this work, we study the optical
alignment of the spin 3/2 negatively charged silicon vacancy in 6H-SiC. Using a
time-resolved optically detected magnetic resonance technique, we coherently
control the silicon vacancy spin ensemble and measure Rabi frequencies and
spin-lattice relaxation time of all three transitions. Then to study the
optical initialization process of the silicon vacancy spin ensemble, the
vacancy spin ensemble is prepared in different ground states and optically
excited. We describe a simple rate equation model that can explain the observed
behaviour and determine the relevant rate constants.

28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex