Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Use strong coupling strength to coherently preserve quantum entanglement   The dynamics of two qubits ultra-strongly coupled with a quantum oscillator
is investigated by the adiabatic approximation method. The evolution formula of
the initial four Bell states are studied under the control mechanism of the
coherent state of the quantum oscillator. The influential parameters for the
preservation of the entanglement are the four parameters: the average number of
the coherent state, the ultra-strong coupling strength, the ratio of two
frequencies of qubit and oscillator, and the inter-interaction coupling of the
two qubits. The novel results show that the appropriate choice of these
parameters can enable this mechanism to be utilized to preserve the
entanglement of the two qubits, which is initially in the state |I_0> of the
four Bell states. We give two different schemes to choose the respective
parameters to maintain the entangled state |I_0> almost unchanged. The results
will be helpful for the quantum information process.

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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
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The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org