Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-photon exchange interaction from Dicke Hamiltonian under parametric
  modulation   We consider the nonstationary circuit QED architecture in which a single-mode
cavity interacts with N>1 identical qubits, and some system parameters undergo
a weak external perturbation. It is shown that in the dispersive regime one can
engineer the two-photon exchange interaction by adjusting the frequency of
harmonic modulation to (approximately) $2|\Delta _{-}|$, where $\Delta _{-}$ is
the average atom--field detuning. Closed analytic description is derived for
the weak atom-field coupling regime, and numeric simulations indicate that the
phenomenon can be observed in the present setups.

29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs