Arbitrarily loss-tolerant Einstein-Podolsky-Rosen steering allowing a demonstration over 1 km of optical fiber with no detection loophole

Bennet, Adam; Evans, D. A.; Saunders, D. J.; Branciard, Cyril; Cavalcanti, Eric G.; Wiseman, Howard Mark; Pryde, Geoff J.

doi:10.1364/qim.2012.qt4a.4

Cited by 49 publications

(84 citation statements)

References 22 publications

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“…As with Bell tests, closure of the steering detection loophole has only recently been achieved in state-of-the-art single-photon experiments [36][37][38]. This is in stark contrast to the CV case where detection-loophole-free tests have been experimentally feasible for over 20 years [39] and very strong violations of steering inequalities have been demonstrated [40].…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution

Walk¹,

Hosseini²,

Geng³

et al. 2016

Optica

166

104

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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 (EPR) steering plays a key role in one-sided device-independent (1sDI) quantum key distribution (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 and 3.5 km of optical fiber transmission, respectively. We also engage in detailed modeling 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 CV-QKD systems in a significantly more secure setting.

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Section: Introductionmentioning

confidence: 99%

Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution

Walk¹,

Hosseini²,

Geng³

et al. 2016

Optica

166

104

View full text Add to dashboard Cite

show abstract

“…In these proposals it has been shown that there exists pump (p), signal (s) and idler (i) focusing parameters for which both the heralding efficiency into single mode optical fibers and the generation rates are high. In addition, high heralding efficiency has been demonstrated experimentally [12][13][14][15][16][17]. These articles, however, do not provide a practical methodology to obtain high heralding efficiencies and the general theoretical treatments presented in [2,3] still require considerable adaptation on an experimental level.…”

Section: Introductionmentioning

confidence: 99%

High efficiency coupling of photon pairs in practice

Guerreiro¹,

Martin²,

Sanguinetti³

et al. 2013

Opt. Express

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Abstract:Multi-photon and quantum communication experiments such as loophole-free Bell tests and device independent quantum key distribution require entangled photon sources which display high coupling efficiency. In this paper we put forward a simple quantum theoretical model which allows the experimenter to design a source with high pair coupling efficiency. In particular we apply this approach to a situation where high coupling has not been previously obtained: we demonstrate a symmetric coupling efficiency of more than 80% in a highly frequency non-degenerate configuration. Furthermore, we demonstrate this technique in a broad range of configurations, i.e. in continuous wave and pulsed pump regimes, and for different nonlinear crystals. Nam, R. Ursin, and A. Zeilinger, "Bell violation using entangled photons without the fair-sampling assumption," Nature 497, 227-230 (2013). 16. M. D. C. Pereira, F. E. Becerra, B. L. Glebov, J. Fan, S. W. Nam, and A. Migdall, "Demonstrating highly symmetric single-mode, single-photon heralding efficiency in spontaneous parametric downconversion," Opt. Lett. 38, 1609Lett. 38, -1611Lett. 38, (2013.

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“…As noted earlier, all experimental evidence to date supports the correctness of minimal quantum theory [20]; indeed quantum entanglement is now routinely observed over mesoscopic and macroscopic spatial (e.g., [24][25][26]) and temporal (e.g., [27][28][29]) scales. This growing body of evidence renders the existence of a domain in which physical dynamics are actually classical, as opposed to just approximately and apparently classical, increasingly unlikely.…”

Section: Quantum and Classicalmentioning

confidence: 58%

Equivalence of the Symbol Grounding and Quantum System Identification Problems

Fields

2014

Information

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The symbol grounding problem is the problem of specifying a semantics for the representations employed by a physical symbol system in a way that is neither circular nor regressive. The quantum system identification problem is the problem of relating observational outcomes to specific collections of physical degrees of freedom, i.e., to specific Hilbert spaces. It is shown that with reasonable physical assumptions these problems are equivalent. As the quantum system identification problem is demonstrably unsolvable by finite means, the symbol grounding problem is similarly unsolvable.

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Arbitrarily loss-tolerant Einstein-Podolsky-Rosen steering allowing a demonstration over 1 km of optical fiber with no detection loophole

Cited by 49 publications

References 22 publications

Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution

Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution

High efficiency coupling of photon pairs in practice

Equivalence of the Symbol Grounding and Quantum System Identification Problems

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