Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: All-optical implementation of a dynamic-decoupling protocol for hole
  spins in (In,Ga)As quantum dots   We demonstrate the potential of a periodic laser-pulse protocol for dynamic
decoupling of hole spins in (In,Ga)As quantum dots from surrounding baths. When
doubling the repetition rate of inversionlaser pulses between two reference
pulses for orienting the spins, we find that the spin coherence time is
increased by a factor of two.

15
The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
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
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
16
The categories of this paper are: stat