Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Assessment and Optimization of Discrete-Variable
  Time-Frequency Quantum Key Distribution   The discrete variables (DV) time-frequency (TF) quantum key distribution
(QKD) protocol is a BB84 like protocol, which utilizes time and frequency as
complementary bases. As orthogonal modulations, pulse position modulation (PPM)
and frequency shift keying (FSK) are capable of transmitting several bits per
symbol, i.e. per photon. However, unlike traditional binary polarization shift
keying, PPM and FSK do not allow perfectly complementary bases. So information
is not completely deleted when the wrong-basis filters are applied. Since a
general security proof does not yet exist, we numerically assess DV-TF-QKD. We
show that the secret key rate increases with a higher number of symbols per
basis. Further we identify the optimal pulse relations in the two bases in
terms of key rate and resistance against eavesdropping attacks.

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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: ao-sci
14
The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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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: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: comp-gas