Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unconditional Security of Time-energy Entanglement Quantum Key
  Distribution using Dual-basis Interferometry   High-dimensional quantum key distribution (HDQKD) offers the possibility of
high secure-key rate with high photon-information efficiency. We consider HDQKD
based on the time-energy entanglement produced by spontaneous parametric
downconversion, and show that it is secure against collective attacks. Its
security rests upon visibility data -- obtained from Franson and
conjugate-Franson interferometers -- that probe photon-pair frequency
correlations and arrival-time correlations. From these measurements an upper
bound can be established on the eavesdropper's Holevo information by
translating the Gaussian-state security analysis for continuous-variable
quantum key distribution so that it applies to our protocol. We show that
visibility data from just the Franson interferometer provides a weaker, but
nonetheless useful, secure-key rate lower bound. To handle multiple-pair
emissions, we incorporate the decoy-state approach into our protocol. Our
results show that over 200\,km transmission distance in optical fiber,
time-energy entanglement HDQKD could permit a 700 bit/sec secure-key rate, and
a photon information efficiency of 2 secure-key bits per photon coincidence in
the key-generation phase using receivers with 15% system efficiency.

24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom