Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decoherence of two qubits in a non-Markovian reservoir without
  rotating-wave approximation   The decoherence of two initially entangled qubits in a non-Markovian
reservoir has been investigated exactly without Born Markovian approximation
and rotating-wave approximation(RWA). The non-perturbative quantum master
equation is derived and its exact solution is obtained. The decoherence
behaviors of two qubits, initially entangled in Bell states, has been
investigated in three different cases of parameters. The results show that the
counter-rotating wave terms have great influence on the decoherence behavior,
and there are differences between the exact solution of the Hamiltonian with
RWA and that of the exact Hamiltonian without RWA. It might be improper to take
RWA when the atom is in a non-markovian reservoir.

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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics