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dc.contributor.authorGariano, John
dc.contributor.authorDjordjevic, Ivan B.
dc.date.accessioned2018-01-31T19:06:15Z
dc.date.available2018-01-31T19:06:15Z
dc.date.issued2017-10-05
dc.identifier.citationJohn Gariano, Ivan B. Djordjevic, "Multimode entanglement assisted QKD through a free-space maritime channel", Proc. SPIE 10442, Quantum Information Science and Technology III, 104420B (5 October 2017); doi: 10.1117/12.2277511; http://dx.doi.org/10.1117/12.2277511en
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2277511
dc.identifier.urihttp://hdl.handle.net/10150/626495
dc.description.abstractWhen using quantum key distribution (QKD), one of the trade-offs for security is that the generation rate of a secret key is typically very low. Recent works have shown that using a weak coherent source allows for higher secret key generation rates compared to an entangled photon source, when a channel with low loss is considered. In most cases, the system that is being studied is over a fiber-optic communication channel. Here a theoretical QKD system using the BB92 protocol and entangled photons over a free-space maritime channel with multiple spatial modes is presented. The entangled photons are generated from a spontaneous parametric down conversion (SPDC) source of type II. To employ multiple spatial modes, the transmit apparatus will contain multiple SPDC sources, all driven by the pump lasers assumed to have the same intensity. The receive apparatuses will contain avalanche photo diodes (APD), modeled based on the NuCrypt CPDS-1000 detector, and located at the focal point of the receive aperture lens. The transmitter is assumed to be located at Alice and Bob will be located 30 km away, implying no channel crosstalk will be introduced in the measurements at Alices side due to turbulence. To help mitigate the effects of atmospheric turbulence, adaptive optics will be considered at the transmitter and the receiver. An eavesdropper, Eve, is located 15 km from Alice and has no control over the devices at Alice or Bob. Eve is performing the intercept resend attack and listening to the communication over the public channel. Additionally, it is assumed that Eve can correct any aberrations caused by the atmospheric turbulence to determine which source the photon was transmitted from. One, four and nine spatial modes are considered with and without applying adaptive optics and compared to one another.
dc.description.sponsorshipONR MURI program [N00014-13-1-0627]en
dc.language.isoenen
dc.publisherSPIE-INT SOC OPTICAL ENGINEERINGen
dc.relation.urlhttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/10442/2277511/Multimode-entanglement-assisted-QKD-through-a-free-space-maritime-channel/10.1117/12.2277511.fullen
dc.rights© 2017 SPIE.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectEntanglement Quantum Key Distributionen
dc.subjectAdaptive Opticsen
dc.subjectMulti-mode Free-Space Optical Communicationen
dc.subjectType II SPDC sourceen
dc.titleMultimode entanglement assisted QKD through a free-space maritime channelen
dc.typeArticleen
dc.identifier.eissn1996-756X
dc.contributor.departmentUniv Arizonaen
dc.identifier.journalQUANTUM INFORMATION SCIENCE AND TECHNOLOGY IIIen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-09-12T01:11:39Z
html.description.abstractWhen using quantum key distribution (QKD), one of the trade-offs for security is that the generation rate of a secret key is typically very low. Recent works have shown that using a weak coherent source allows for higher secret key generation rates compared to an entangled photon source, when a channel with low loss is considered. In most cases, the system that is being studied is over a fiber-optic communication channel. Here a theoretical QKD system using the BB92 protocol and entangled photons over a free-space maritime channel with multiple spatial modes is presented. The entangled photons are generated from a spontaneous parametric down conversion (SPDC) source of type II. To employ multiple spatial modes, the transmit apparatus will contain multiple SPDC sources, all driven by the pump lasers assumed to have the same intensity. The receive apparatuses will contain avalanche photo diodes (APD), modeled based on the NuCrypt CPDS-1000 detector, and located at the focal point of the receive aperture lens. The transmitter is assumed to be located at Alice and Bob will be located 30 km away, implying no channel crosstalk will be introduced in the measurements at Alices side due to turbulence. To help mitigate the effects of atmospheric turbulence, adaptive optics will be considered at the transmitter and the receiver. An eavesdropper, Eve, is located 15 km from Alice and has no control over the devices at Alice or Bob. Eve is performing the intercept resend attack and listening to the communication over the public channel. Additionally, it is assumed that Eve can correct any aberrations caused by the atmospheric turbulence to determine which source the photon was transmitted from. One, four and nine spatial modes are considered with and without applying adaptive optics and compared to one another.


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