Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s
Top-performance sources of photonic entanglement are an indispensable resource for many applications in quantum communication, most notably quantum key distribution. However, up to now, no source has been shown to simultaneously exhibit the high pair-creation rate, broad bandwidth, excellent state f...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2022-09-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2022-09-29-822/pdf/ |
| _version_ | 1811208422016679936 |
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| author | Sebastian Philipp Neumann Mirela Selimovic Martin Bohmann Rupert Ursin |
| author_facet | Sebastian Philipp Neumann Mirela Selimovic Martin Bohmann Rupert Ursin |
| author_sort | Sebastian Philipp Neumann |
| collection | DOAJ |
| description | Top-performance sources of photonic entanglement are an indispensable resource for many applications in quantum communication, most notably quantum key distribution. However, up to now, no source has been shown to simultaneously exhibit the high pair-creation rate, broad bandwidth, excellent state fidelity, and low intrinsic loss necessary for gigabit secure key rates. In this work, we present for the first time a source of polarization-entangled photon pairs at telecommunication wavelengths that covers all these needs of real-world quantum-cryptographic applications, thus enabling unprecedented quantum-secure key rates of more than 1 Gbit/s. Our source is designed to optimally exploit state-of-the-art telecommunication equipment and detection systems. Any technological improvement of the latter would result in an even higher rate without modification of the source. We discuss the used wavelength-multiplexing approach, including its potential for multi-user quantum networks and its fundamental limitations. Our source paves the way for high-speed quantum encryption approaching present-day internet bandwidth. |
| first_indexed | 2024-04-12T04:20:56Z |
| format | Article |
| id | doaj.art-3d237fb14cde45138aba2abbd23b8b23 |
| institution | Directory Open Access Journal |
| issn | 2521-327X |
| language | English |
| last_indexed | 2024-04-12T04:20:56Z |
| publishDate | 2022-09-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj.art-3d237fb14cde45138aba2abbd23b8b232022-12-22T03:48:14ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2022-09-01682210.22331/q-2022-09-29-82210.22331/q-2022-09-29-822Experimental entanglement generation for quantum key distribution beyond 1 Gbit/sSebastian Philipp NeumannMirela SelimovicMartin BohmannRupert UrsinTop-performance sources of photonic entanglement are an indispensable resource for many applications in quantum communication, most notably quantum key distribution. However, up to now, no source has been shown to simultaneously exhibit the high pair-creation rate, broad bandwidth, excellent state fidelity, and low intrinsic loss necessary for gigabit secure key rates. In this work, we present for the first time a source of polarization-entangled photon pairs at telecommunication wavelengths that covers all these needs of real-world quantum-cryptographic applications, thus enabling unprecedented quantum-secure key rates of more than 1 Gbit/s. Our source is designed to optimally exploit state-of-the-art telecommunication equipment and detection systems. Any technological improvement of the latter would result in an even higher rate without modification of the source. We discuss the used wavelength-multiplexing approach, including its potential for multi-user quantum networks and its fundamental limitations. Our source paves the way for high-speed quantum encryption approaching present-day internet bandwidth.https://quantum-journal.org/papers/q-2022-09-29-822/pdf/ |
| spellingShingle | Sebastian Philipp Neumann Mirela Selimovic Martin Bohmann Rupert Ursin Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s Quantum |
| title | Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s |
| title_full | Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s |
| title_fullStr | Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s |
| title_full_unstemmed | Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s |
| title_short | Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s |
| title_sort | experimental entanglement generation for quantum key distribution beyond 1 gbit s |
| url | https://quantum-journal.org/papers/q-2022-09-29-822/pdf/ |
| work_keys_str_mv | AT sebastianphilippneumann experimentalentanglementgenerationforquantumkeydistributionbeyond1gbits AT mirelaselimovic experimentalentanglementgenerationforquantumkeydistributionbeyond1gbits AT martinbohmann experimentalentanglementgenerationforquantumkeydistributionbeyond1gbits AT rupertursin experimentalentanglementgenerationforquantumkeydistributionbeyond1gbits |