| 1. |
- Adenier, Guillaume, et al.
(författare)
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A Fair sampling test for Ekert protocol
- 2011
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Ingår i: Quantum Bio-inforamtics IV. - : World Scientific. - 9789814343756 - 9789814343763 ; , s. 403-412
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Bokkapitel (refereegranskat)
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| 2. |
- Adenier, Guillaume, et al.
(författare)
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Double Blinding-Attack on Entanglement-Based Quantum Key Distribution Protocols
- 2012
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Ingår i: AIP Conference Proceedings. - : AIP. - 0094-243X .- 1551-7616. - 9780735410046 ; 1424:1, s. 9-16
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Tidskriftsartikel (refereegranskat)abstract
- We propose a double blinding-attack on entangled-based quantum key distribution protocols. The principle of the attack is the same as in existing blinding attack except that instead of blinding the detectors on one side only, Eve is blinding the detectors of both Alice and Bob. In the BBM92 protocol, the attack allows Eve to get a full knowledge of the key and remain undetected even if Alice and Bob are using 100% efficient detectors. The attack can be easily extended to Ekert protocol, with an efficiency as high as 85.3%.
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| 3. |
- Adenier, Guillaume, et al.
(författare)
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Fair sampling and rotational invariance in EPR experiments
- 2007
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Ingår i: The Nature of Light: What Are Photons?. - : SPIE. - 9780819468123
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We have previously shown that the use of the fair sampling assumption in EPR experiments could be questioned on the basis of experimental data. We continue our analysis of the data from the optical EPR experimental performed by Weihs et al. in Innsbruck 1997-1998, and we discuss whether a non-rotationally invariant source can account for the experimental results.
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| 4. |
- Adenier, Guillaume, et al.
(författare)
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Fair Sampling vs No-Signalling Principle in EPR experiments
- 2007
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Ingår i: Beyond the Quantum. - : World Scientific Publishing, Singapore. - 9789812771179 ; , s. 181-187
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Konferensbidrag (populärvet., debatt m.m.)abstract
- We present some recent results of a new statistical analysis of the optical EPR experiment performed by Weihs et al in Innsbruck 1997-1998. Under the commonly used assumption of fair sampling, we show that the coincidence counts exhibit a small and anomalous non-signalling component, which seems impossible to explain by using the conventional quantum mechanics, and we discuss some possible interpretations of this phenomenon.
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| 5. |
- Adenier, Guillaume, et al.
(författare)
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Is the fair sampling assumption supported by EPR experiments?
- 2007
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Ingår i: Journal of Physics B: At. Mol. Opt. Phys.. - : Institute of Physics ( IOP ), Bristol. - 0953-4075 .- 1361-6455. ; 40:1, s. 131-141
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Tidskriftsartikel (refereegranskat)abstract
- We analyse optical EPR experimental data performed by Weihs et al in Innsbruck 1997–1998. We show that for some linear combinations of the raw coincidence rates, the experimental results display some anomalous behaviour that a more general source state (like non-maximally entangled state) cannot straightforwardly account for. We attempt to explain these anomalies by taking account of the relative efficiencies of the four channels. For this purpose, we use the fair sampling assumption, and assume explicitly that the detection efficiencies for the pairs of entangled photons can be written as a product of the two corresponding detection efficiencies for the single photons. We show that this explicit use of fair sampling cannot be maintained to be a reasonable assumption as it leads to an apparent violation of the no-signalling principle.
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| 6. |
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| 7. |
- Adenier, Guillaume, et al.
(författare)
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Multiple-photon absorption attack on entanglement-based quantum key distribution protocols
- 2013
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Ingår i: Quantum Bio-Informatics V: Proceedings of the Quantum Bio-Informatics 2011 : <em>Tokyo University of Science, Japan, </em><em>7 – 12 March 2011</em>. - Singapore : World Scientific. - 9789814460019 ; , s. 171-180
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Konferensbidrag (refereegranskat)abstract
- We propose a multiple-photon absorption attack on Quantum Key Distribution protocols. In this attack, the eavesdropper (Eve) is in control of the source and sends pulses correlated in polarization (but not entangled) containing several photons at frequencies for which only multiple-photon absorptions are possible in Alice's and Bob's detectors. Whenever the number of photons from one pulse are dispatched in insufficient number to trigger a multiple-photon absorption in either channel, the pulse remains undetected. We show that this simple feature is enough to reproduce the type of statistics on the detected pulses that are considered as indicating a secure quantum key distribution in entangled-based protocols, even though the source is controlled by Eve, and we discuss possible countermeasures.
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| 8. |
- ADENIER, Guillaume
(författare)
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Probabilistic Analysis of the EPR-Bohm Experiment
- 2007
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Bell's Theorem was developed on the basis of considerationsinvolving a linear combination of spin correlation functions, eachof which has a distinct pair of arguments. The simultaneouspresence of these different pairs of arguments in the sameequation is investigated, and the implicit counterfactualassumption in Bell's theorem is discussed.We show how an explicit contextuality can arise from a modeldisplaying unfair sampling, and we discuss it in theframework of David Mermin's cleverly simple version of Bell'stheore, which pinpoints in a very straightforward way howinterpreting entanglement from a realistic point of view can beproblematic. We present an extended version of Mermin's devicethat can actually be given a straightforward realisticinterpretation.We stress that the low efficiency of detectors in all experimentswith photons makes the use of the fair sampling assumptionunavoidable. Since this very assumption is false in all existinglocal realistic models based on inefficient detection, we thusquestion its validity. We show that it is no more reasonable toassume fair sampling than it is impossible to test, and weactually propose an experimental test which would provides clearcut results in case of unfair samplingWe then analyze optical EPR experimental data performed by Weihs et al in Innsbruck 1997-1998. We show that for some linearcombinations of the raw coincidence rates, the experimentalresults display some anomalous behavior that a more general source state (like non-maximally entangled state) cannotstraightforwardly account for. We use the fair samplingassumption, and assume explicitly that the detection efficienciesfor the pairs of entangled photons can be written as a product ofthe two corresponding detection efficiencies for the singlephotons. We show that this explicit use of fair sampling cannot bemaintained to be a reasonable assumption as it leads to anapparent violation of the no-signalling principle.
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| 9. |
- Adenier, Guillaume, et al.
(författare)
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Test of the no-signaling principle in the Hensen loophole-free CHSH experiment
- 2017
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Ingår i: Fortschritte der Physik. - : Wiley-Blackwell. - 0015-8208 .- 1521-3978. ; 65:9
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Tidskriftsartikel (refereegranskat)abstract
- We analyze the data from the loophole-free CHSH experiment performed by Hensen et al., and show that it is actually not exempt of an important loophole. By increasing the size of the sample of event-ready detections, one can exhibit in the experimental data a violation of the no-signaling principle with a statistical significance at least similar to that of the reported violation of the CHSH inequality, if not stronger. The data from the loophole-free CHSH experiment performed by Hensen et al. are analysed, It is shown that it is actually not exempt of an important loophole. By increasing the size of the sample of event-ready detections, one can exhibit in the experimental data a violation of the no-signaling principle with a statistical significance at least similar to that of the reported violation of the CHSH inequality, if not stronger.
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| 10. |
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