@Article{Sit2017,
  author          = {Sit, A. and Bouchard, F. and Fickler, R. and Gagnon-Bischoff, J. and Larocque, H. and Heshami, K. and Elser, D. and Peuntinger, C. and G{\"{u}}nthner, K. and Heim, B. and Marquardt, C. and Leuchs, G. and Boyd, R.W. and Karimi, E.},
  journal         = {Optica},
  title           = {High-dimensional intracity quantum cryptography with structured photons},
  year            = {2017},
  number          = {9},
  pages           = {1006--1010},
  volume          = {4},
  abstract        = {Quantum key distribution (QKD) promises information-theoretically secure communication and is already on the verge of commercialization. The next step will be to implement high-dimensional protocols in order to improve noise resistance and increase the data rate. Hitherto, no experimental verification of high-dimensional QKD in the single-photon regime has been conducted outside of the laboratory. Here, we report the realization of such a single-photon QKD system in a turbulent free-space link of 0.3 km over the city of Ottawa, taking advantage of both the spin and orbital angular momentum photonic degrees of freedom. This combination of optical angular momenta allows us to create a 4-dimensional quantum state; wherein, using a high-dimensional BB84 protocol, a quantum bit error rate of 11% was attained with a corresponding secret key rate of 0.65 bits per sifted photon. In comparison, an error rate of 5% with a secret key rate of 0.43 bits per sifted photon is achieved for the case of 2-dimensional structured photons. We thus demonstrate that, even through moderate turbulence without active wavefront correction, high-dimensional photon states are advantageous for securely transmitting more information. This opens the way for intracity high-dimensional quantum communications under realistic conditions. {\copyright} 2017 Optical Society of America.},
  affiliation     = {Physics Department, Centre for Research in Photonics, University of Ottawa, Advanced Research Complex, 25 Templeton, Ottawa, ON, Canada; National Research Council of Canada, 100 Sussex Drive, Ottawa, ON, Canada; Max-Planck-Institut für die Physik des Lichts, Staudtstraße 2, Erlangen, Germany; Institut für Opti, Information und Photonik, Universität Erlangen-Nürnberg, Staudtstraße 7/B2, Erlangen, Germany; Institute of Optics, University of Rochester, Rochester, NY, United States; Department of Physics, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran},
  author_keywords = {Free-space optical communication; Optical vortices; Quantum cryptography},
  document_type   = {Article},
  doi             = {10.1364/OPTICA.4.001006},
  groups          = {[paul:]},
  source          = {Scopus},
  timestamp       = {2018.07.12},
  url             = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029861458&doi=10.1364%2fOPTICA.4.001006&partnerID=40&md5=cc2fd01a976a7229c3f7ee2f141b021c},
}

{"_id":"bPT95Fvmovs2Gkrfm","bibbaseid":"sit-bouchard-fickler-gagnonbischoff-larocque-heshami-elser-peuntinger-etal-highdimensionalintracityquantumcryptographywithstructuredphotons-2017","downloads":0,"creationDate":"2018-07-12T15:49:03.200Z","title":"High-dimensional intracity quantum cryptography with structured photons","author_short":["Sit, A.","Bouchard, F.","Fickler, R.","Gagnon-Bischoff, J.","Larocque, H.","Heshami, K.","Elser, D.","Peuntinger, C.","Günthner, K.","Heim, B.","Marquardt, C.","Leuchs, G.","Boyd, R.","Karimi, E."],"year":2017,"bibtype":"article","biburl":"http://github.com/phockett/UQO-group/raw/main/group_ongoing.bib","bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Sit"],"firstnames":["A."],"suffixes":[]},{"propositions":[],"lastnames":["Bouchard"],"firstnames":["F."],"suffixes":[]},{"propositions":[],"lastnames":["Fickler"],"firstnames":["R."],"suffixes":[]},{"propositions":[],"lastnames":["Gagnon-Bischoff"],"firstnames":["J."],"suffixes":[]},{"propositions":[],"lastnames":["Larocque"],"firstnames":["H."],"suffixes":[]},{"propositions":[],"lastnames":["Heshami"],"firstnames":["K."],"suffixes":[]},{"propositions":[],"lastnames":["Elser"],"firstnames":["D."],"suffixes":[]},{"propositions":[],"lastnames":["Peuntinger"],"firstnames":["C."],"suffixes":[]},{"propositions":[],"lastnames":["Günthner"],"firstnames":["K."],"suffixes":[]},{"propositions":[],"lastnames":["Heim"],"firstnames":["B."],"suffixes":[]},{"propositions":[],"lastnames":["Marquardt"],"firstnames":["C."],"suffixes":[]},{"propositions":[],"lastnames":["Leuchs"],"firstnames":["G."],"suffixes":[]},{"propositions":[],"lastnames":["Boyd"],"firstnames":["R.W."],"suffixes":[]},{"propositions":[],"lastnames":["Karimi"],"firstnames":["E."],"suffixes":[]}],"journal":"Optica","title":"High-dimensional intracity quantum cryptography with structured photons","year":"2017","number":"9","pages":"1006–1010","volume":"4","abstract":"Quantum key distribution (QKD) promises information-theoretically secure communication and is already on the verge of commercialization. The next step will be to implement high-dimensional protocols in order to improve noise resistance and increase the data rate. Hitherto, no experimental verification of high-dimensional QKD in the single-photon regime has been conducted outside of the laboratory. Here, we report the realization of such a single-photon QKD system in a turbulent free-space link of 0.3 km over the city of Ottawa, taking advantage of both the spin and orbital angular momentum photonic degrees of freedom. This combination of optical angular momenta allows us to create a 4-dimensional quantum state; wherein, using a high-dimensional BB84 protocol, a quantum bit error rate of 11% was attained with a corresponding secret key rate of 0.65 bits per sifted photon. In comparison, an error rate of 5% with a secret key rate of 0.43 bits per sifted photon is achieved for the case of 2-dimensional structured photons. We thus demonstrate that, even through moderate turbulence without active wavefront correction, high-dimensional photon states are advantageous for securely transmitting more information. This opens the way for intracity high-dimensional quantum communications under realistic conditions. © 2017 Optical Society of America.","affiliation":"Physics Department, Centre for Research in Photonics, University of Ottawa, Advanced Research Complex, 25 Templeton, Ottawa, ON, Canada; National Research Council of Canada, 100 Sussex Drive, Ottawa, ON, Canada; Max-Planck-Institut für die Physik des Lichts, Staudtstraße 2, Erlangen, Germany; Institut für Opti, Information und Photonik, Universität Erlangen-Nürnberg, Staudtstraße 7/B2, Erlangen, Germany; Institute of Optics, University of Rochester, Rochester, NY, United States; Department of Physics, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran","author_keywords":"Free-space optical communication; Optical vortices; Quantum cryptography","document_type":"Article","doi":"10.1364/OPTICA.4.001006","groups":"[paul:]","source":"Scopus","timestamp":"2018.07.12","url":"https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029861458&doi=10.1364%2fOPTICA.4.001006&partnerID=40&md5=cc2fd01a976a7229c3f7ee2f141b021c","bibtex":"@Article{Sit2017,\n author = {Sit, A. and Bouchard, F. and Fickler, R. and Gagnon-Bischoff, J. and Larocque, H. and Heshami, K. and Elser, D. and Peuntinger, C. and G{\\\"{u}}nthner, K. and Heim, B. and Marquardt, C. and Leuchs, G. and Boyd, R.W. and Karimi, E.},\n journal = {Optica},\n title = {High-dimensional intracity quantum cryptography with structured photons},\n year = {2017},\n number = {9},\n pages = {1006--1010},\n volume = {4},\n abstract = {Quantum key distribution (QKD) promises information-theoretically secure communication and is already on the verge of commercialization. The next step will be to implement high-dimensional protocols in order to improve noise resistance and increase the data rate. Hitherto, no experimental verification of high-dimensional QKD in the single-photon regime has been conducted outside of the laboratory. Here, we report the realization of such a single-photon QKD system in a turbulent free-space link of 0.3 km over the city of Ottawa, taking advantage of both the spin and orbital angular momentum photonic degrees of freedom. This combination of optical angular momenta allows us to create a 4-dimensional quantum state; wherein, using a high-dimensional BB84 protocol, a quantum bit error rate of 11% was attained with a corresponding secret key rate of 0.65 bits per sifted photon. In comparison, an error rate of 5% with a secret key rate of 0.43 bits per sifted photon is achieved for the case of 2-dimensional structured photons. We thus demonstrate that, even through moderate turbulence without active wavefront correction, high-dimensional photon states are advantageous for securely transmitting more information. This opens the way for intracity high-dimensional quantum communications under realistic conditions. {\\copyright} 2017 Optical Society of America.},\n affiliation = {Physics Department, Centre for Research in Photonics, University of Ottawa, Advanced Research Complex, 25 Templeton, Ottawa, ON, Canada; National Research Council of Canada, 100 Sussex Drive, Ottawa, ON, Canada; Max-Planck-Institut für die Physik des Lichts, Staudtstraße 2, Erlangen, Germany; Institut für Opti, Information und Photonik, Universität Erlangen-Nürnberg, Staudtstraße 7/B2, Erlangen, Germany; Institute of Optics, University of Rochester, Rochester, NY, United States; Department of Physics, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran},\n author_keywords = {Free-space optical communication; Optical vortices; Quantum cryptography},\n document_type = {Article},\n doi = {10.1364/OPTICA.4.001006},\n groups = {[paul:]},\n source = {Scopus},\n timestamp = {2018.07.12},\n url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029861458&doi=10.1364%2fOPTICA.4.001006&partnerID=40&md5=cc2fd01a976a7229c3f7ee2f141b021c},\n}\n\n","author_short":["Sit, A.","Bouchard, F.","Fickler, R.","Gagnon-Bischoff, J.","Larocque, H.","Heshami, K.","Elser, D.","Peuntinger, C.","Günthner, K.","Heim, B.","Marquardt, C.","Leuchs, G.","Boyd, R.","Karimi, E."],"key":"Sit2017","id":"Sit2017","bibbaseid":"sit-bouchard-fickler-gagnonbischoff-larocque-heshami-elser-peuntinger-etal-highdimensionalintracityquantumcryptographywithstructuredphotons-2017","role":"author","urls":{"Paper":"https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029861458&doi=10.1364%2fOPTICA.4.001006&partnerID=40&md5=cc2fd01a976a7229c3f7ee2f141b021c"},"metadata":{"authorlinks":{}},"downloads":0},"search_terms":["high","dimensional","intracity","quantum","cryptography","structured","photons","sit","bouchard","fickler","gagnon-bischoff","larocque","heshami","elser","peuntinger","günthner","heim","marquardt","leuchs","boyd","karimi"],"keywords":[],"authorIDs":[],"dataSources":["6KGmJxs9RrDfHzcu8","H7fwLrC4uE8sA55y4","74PaJ3jeYTJQFhBLi","Cyvp3egaEX9XcqyzN","BqutdYRmHLywqGRJb"]}