Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental protocol for high-fidelity heralded photon-to-atom quantum
  state transfer   A quantum network combines the benefits of quantum systems regarding secure
information transmission and calculational speed-up by employing quantum
coherence and entanglement to store, transmit, and process information. A
promising platform for implementing such a network are atom-based quantum
memories and processors, interconnected by photonic quantum channels. A crucial
building block in this scenario is the conversion of quantum states between
single photons and single atoms through controlled emission and absorption.
Here we present an experimental protocol for photon-to-atom quantum state
conversion, whereby the polarization state of an absorbed photon is mapped onto
the spin state of a single absorbing atom with >95% fidelity, while successful
conversion is heralded by a single emitted photon. Heralded high-fidelity
conversion without affecting the converted state is a main experimental
challenge, in order to make the transferred information reliably available for
further operations. We record >80/s successful state transfer events out of
18,000/s repetitions.

33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex