Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical qubit generation via atomic postselection in a Ramsey
  interferometer   We propose a realizable experimental scheme to prepare a superposition of the
vacuum and one-photon states using a typical cavity QED-setup. This is
different from previous schemes, where the superposition state of the field is
generated by resonant atom-field interaction and the cavity is initially empty.
Here, we consider only dispersive atom-field interaction and the initial state
of the cavity field is coherent. Then, we determine the parameters to prepare
the desired state via atomic postselection. We also include the effect of
cavity losses and detection imperfections in our analysis, against which this
preparation of the optical qubit in a real Fabry-P\'{e}rot superconducting
cavity is robust. Additionally, we show that this scheme can be used for the
preparation of other photon number Fock state superpositions. In summary, our
task is achieved with a high fidelity and a postselection probability within
experimental reach

30
The categories of this paper are: q-alg
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom