Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution
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Walk, Nathan; Hosseni, Sara; Geng, Jiao; Thearle, Oliver; Haw, Jing Yan; Armstrong, Seiji; Assad, Syed M.; Janousek, Jiri; Ralph, Timothy C.; Symul, Thomas; Wiseman, Howard M.; Lam, Ping Koy
Description
Nonlocal correlations, a longstanding foundational topic in quantum information, have recently found application as a resource for cryptographic tasks where not all devices are trusted, for example in settings with a highly secure central hub, such as a bank or government department, and less secure satellite stations which are inherently more vulnerable to hardware "hacking" attacks. The asymmetric phenomena of Einstein-Podolsky-Rosen steering plays a key role in one-sided device-independent...[Show more]
dc.contributor.author | Walk, Nathan | |
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dc.contributor.author | Hosseni, Sara | |
dc.contributor.author | Geng, Jiao | |
dc.contributor.author | Thearle, Oliver | |
dc.contributor.author | Haw, Jing Yan | |
dc.contributor.author | Armstrong, Seiji | |
dc.contributor.author | Assad, Syed M. | |
dc.contributor.author | Janousek, Jiri | |
dc.contributor.author | Ralph, Timothy C. | |
dc.contributor.author | Symul, Thomas | |
dc.contributor.author | Wiseman, Howard M. | |
dc.contributor.author | Lam, Ping Koy | |
dc.date.accessioned | 2016-10-10T02:21:31Z | |
dc.date.available | 2016-10-10T02:21:31Z | |
dc.identifier.issn | 2334-2536 | |
dc.identifier.uri | http://hdl.handle.net/1885/109198 | |
dc.description.abstract | Nonlocal correlations, a longstanding foundational topic in quantum information, have recently found application as a resource for cryptographic tasks where not all devices are trusted, for example in settings with a highly secure central hub, such as a bank or government department, and less secure satellite stations which are inherently more vulnerable to hardware "hacking" attacks. The asymmetric phenomena of Einstein-Podolsky-Rosen steering plays a key role in one-sided device-independent quantum key distribution (1sDI-QKD) protocols. In the context of continuous-variable (CV) QKD schemes utilizing Gaussian states and measurements, we identify all protocols that can be 1sDI and their maximum loss tolerance. Surprisingly, this includes a protocol that uses only coherent states. We also establish a direct link between the relevant EPR steering inequality and the secret key rate, further strengthening the relationship between these asymmetric notions of nonlocality and device independence. We experimentally implement both entanglement-based and coherent-state protocols, and measure the correlations necessary for 1sDI key distribution up to an applied loss equivalent to 7.5 km and 3.5 km of optical fiber transmission respectively. We also engage in detailed modelling to understand the limits of our current experiment and the potential for further improvements. The new protocols we uncover apply the cheap and efficient hardware of CVQKD systems in a significantly more secure setting. | |
dc.description.sponsorship | Australian Research Council (ARC) Centre of Excellence (CE110001027); Engineering and Physical Sciences Research Council (EPSRC) (EP/M013243/1). | |
dc.format | 9 pages | |
dc.publisher | Optical Society of America | |
dc.rights | © 2016 Optical Society of America. | |
dc.source | Optica | |
dc.subject | Quantum cryptography | |
dc.subject | Quantum communications | |
dc.subject | Squeezed states | |
dc.title | Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution | |
dc.type | Journal article | |
local.identifier.citationvolume | 3 | |
dcterms.dateAccepted | 2016-05-09 | |
dc.date.issued | 2016-06 | |
local.publisher.url | http://www.osa.org/ | |
local.type.status | Accepted Version | |
local.contributor.affiliation | Lam, Ping Koy, Department of Quantum Science, CPMS Research School of Physics and Engineering, The Australian National University | |
dc.relation | http://purl.org/au-research/grants/arc/CE110001027 | |
local.bibliographicCitation.issue | 6 | |
local.bibliographicCitation.startpage | 634 | |
local.bibliographicCitation.lastpage | 642 | |
local.identifier.doi | 10.1364/OPTICA.3.000634 | |
dcterms.accessRights | Open Access | |
dc.provenance | http://www.sherpa.ac.uk/romeo/issn/2334-2536/ Author can archive post-print (ie final draft post-refereeing), after 12 months embargo (Sherpa/Romeo as of 7/11/2016). | |
Collections | ANU Research Publications |
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