@article{RauHeindelUnsleberetal.2014,
  author    = {Rau, Markus and Heindel, Tobias and Unsleber, Sebastian and Braun, Tristan and Fischer, Julian and Frick, Stefan and Nauerth, Sebastian and Schneider, Christian and Vest, Gwenaelle and Reitzenstein, Stephan and Kamp, Martin and Forchel, Alfred and H{\"o}fling, Sven and Weinfurter, Harald},
  title     = {Free space quantum key distribution over 500 meters using electrically driven quantum dot single-photon sources-a proof of principle experiment},
  series = {New Journal of Physics},
  volume    = {16},
  journal   = {New Journal of Physics},
  number    = {043003},
  doi       = {10.1088/1367-2630/16/4/043003},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-116760},
  year      = {2014},
  abstract  = {Highly efficient single-photon sources (SPS) can increase the secure key rate of quantum key distribution (QKD) systems compared to conventional attenuated laser systems. Here we report on a free space QKD test using an electrically driven quantum dot single-photon source (QD SPS) that does not require a separate laser setup for optical pumping and thus allows for a simple and compact SPS QKD system. We describe its implementation in our 500 m free space QKD system in downtown Munich. Emulating a BB84 protocol operating at a repetition rate of 125 MHz, we could achieve sifted key rates of 5-17 kHz with error ratios of 6-9\% and g((2))(0)-values of 0.39-0.76.},
  language  = {en}
}
@article{vanLoockAltBecheretal.2020,
  author    = {van Loock, Peter and Alt, Wolfgang and Becher, Christoph and Benson, Oliver and Boche, Holger and Deppe, Christian and Eschner, J{\"u}rgen and H{\"o}fling, Sven and Meschede, Dieter and Michler, Peter and Schmidt, Frank and Weinfurter, Harald},
  title     = {Extending Quantum Links: Modules for Fiber- and Memory-Based Quantum Repeaters},
  series = {Advanced Quantum Technologies},
  volume    = {3},
  journal   = {Advanced Quantum Technologies},
  number    = {11},
  doi       = {10.1002/qute.201900141},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-228322},
  year      = {2020},
  abstract  = {Elementary building blocks for quantum repeaters based on fiber channels and memory stations are analyzed. Implementations are considered for three different physical platforms, for which suitable components are available: quantum dots, trapped atoms and ions, and color centers in diamond. The performances of basic quantum repeater links for these platforms are evaluated and compared, both for present-day, state-of-the-art experimental parameters as well as for parameters that can in principle be reached in the future. The ultimate goal is to experimentally explore regimes at intermediate distances—up to a few 100 km—in which the repeater-assisted secret key transmission rates exceed the maximal rate achievable via direct transmission. Two different protocols are considered, one of which is better adapted to the higher source clock rate and lower memory coherence time of the quantum dot platform, while the other circumvents the need of writing photonic quantum states into the memories in a heralded, nondestructive fashion. The elementary building blocks and protocols can be connected in a modular form to construct a quantum repeater system that is potentially scalable to large distances.},
  language  = {en}
}