Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Transmission Probabilities in Quantum Key Distribution Systems
  over FSO Links   In this paper, we investigate the transmission probabilities in three cases
(depending only on the legitimate receiver, depending only the eavesdropper,
and depending on both legitimate receiver and eavesdropper) in quantum key
distribution (QKD) systems over free-space optical links. To be more realistic,
we consider a generalized pointing error scenario, where the azimuth and
elevation pointing error angles caused by stochastic jitters and vibrations in
the legitimate receiver platform are independently distributed according to a
non-identical normal distribution. Taking these assumptions into account, we
derive approximate expressions of transmission probabilities by using the
Gaussian quadrature method. To simplify the expressions and get some physical
insights, some asymptotic analysis on the transmission probabilities is
presented based on asymptotic expression for the generalized Marcum Q-function
when the telescope gain at the legitimate receiver approaches to infinity.
Moreover, from the asymptotic expression for the generalized Marcum Q-function,
the asymptotic outage probability over Beckmann fading channels (a general
channel model including Rayleigh, Rice, and Hoyt fading channels) can be also
easily derived when the average signal-to-noise ratio is sufficiently large,
which shows the diversity order and array gain.

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The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an