Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Delayed transfer of entanglement to initially populated qubits   The transfer of entangled, quantum correlated, flying photons from a squeezed
field to single-mode cavities is investigated. It is shown that, while the
transfer of photons begins immediately after the input squeezed field is turned
on, the time at which quantum correlations start to be transferred to the
cavities is strongly dependent on the initial population of the cavities. For
the initially empty cavities, the transfer of quantum correlations begins
immediately after the squeezed field is turned on, but it is delayed by a
certain time interval when the cavities are initially populated. We find that
the transfer of the quantum correlations is postponed until the one-photon
states of the system are almost completely depopulated. In other words, the
system "waits" for the population of the single-photon states to decay out
before starting to build up the quantum correlation between the cavities. The
delay time interval is independent of the number of photons initially present
in the system, but it is dependent on the decay rates of the cavities and can
be varied (controlled) when the cavities decay with different rates. It is
shown that the delayed transfer of the quantum correlation is directly related
to the presence of quantum jumps, which transfer the population from the
entangled to incoherent mixture states.

2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th