Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Perturbation Algorithm for the Pointers of
  Franke-Gorini-Kossakowski-Lindblad-Sudarshan Equation   This paper is devoted to the study of behavior of open quantum systems
consistently based on the Franke-Gorini-Kossakowski-Lindblad-Sudarshan (FGKLS)
equation which covers evolution in situations when decoherence can be
distinguished. We focus on the quantum measurement operation which is
determined by final stationary states of an open system - so called pointers.
We find pointers by applying the FGKLS equation to asymptotically constant
density matrix. In seeking pointers, we have been able to propose a
perturbative scheme of calculation, if we take the interaction components with
an environment to be weak. Thus, the Lindblad operators can be used in some way
as expansion parameters for perturbation theory. The scheme we propose is
different for the cases of non-degenerate and degenerate Hamiltonian. We
illustrate our scheme by particular examples of quantum harmonic oscillator
with spin in external magnetic field. The efficiency of the perturbation
algorithm is demonstrated by its comparison with the exact solution.

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The categories of this paper are: eess
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The categories of this paper are: plasm-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
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat