Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards a deterministic interface between trapped-ion qubits and
  travelling photons   Experimental results are presented on the efficiency limits for a quantum
interface between a matter-based qubit and a photonic qubit. Using a trapped
ion in an optical cavity, we obtain a single ion-entangled photon at the cavity
output with a probability of 0.69(3). The performance of our system is shown to
saturate the upper limit to photon-collection probability from a quantum
emitter in a cavity, set by the emitter's electronic structure and by the
cavity parameters. The probability for generating and detecting the
ion-entangled fiber-coupled photon is 0.462(3), a five-fold increase over the
previous best performance. Finally, the generation and detection of up to 15
sequential polarised photons demonstrates the ability of a trapped ion to serve
as a multi-photon source. The comparison between measured probabilities and
predicted bounds is relevant for quantum emitters beyond trapped ions, in
particular, for the design of future systems optimising photon collection from,
and absorption in, quantum matter.

15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin