Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extracting past-future vacuum correlations using circuit QED   We propose a realistic circuit QED experiment to test the extraction of
past-future vacuum entanglement to a pair of superconducting qubits. The qubit
P interacts with the quantum field along an open transmission line for an
interval T_on and then, after a time-lapse T_off, the qubit F starts
interacting for a time T_on in a symmetric fashion. After that, past-future
quantum correlations will have transferred to the qubits, even if the qubits do
not coexist at the same time. We show that this experiment can be realized with
current technology and discuss its utility as a possible implementation of a
quantum memory.

17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics