Quantum randomness extraction for various levels of characterization of the devices

Law, Yun Zhi; Thinh, Le Phuc; Bancal, Jean-Daniel; Scarani, Valerio

doi:10.1088/1751-8113/47/42/424028

Cited by 137 publications

(142 citation statements)

References 65 publications

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“…In particular, Ref. [37] examines the amount of randomness extractable under various levels of characterization of the device and power given to the adversary.…”

Section: Entropy Quantificationmentioning

confidence: 99%

Maximization of Extractable Randomness in a Quantum Random-Number Generator

et al. 2015

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The generation of random numbers via quantum processes is an efficient and reliable method to obtain true indeterministic random numbers that are of vital importance to cryptographic communication and large-scale computer modeling. However, in realistic scenarios, the raw output of a quantum random-number generator is inevitably tainted by classical technical noise. The integrity of the device can be compromised if this noise is tampered with, or even controlled by some malicious party. To safeguard against this, we propose and experimentally demonstrate an approach that produces side-information independent randomness that is quantified by min-entropy conditioned on this classical noise. We present a method for maximizing the conditional min-entropy of the number sequence generated from a given quantum-to-classical-noise ratio. The detected photocurrent in our experiment is shown to have a real-time random-number generation rate of 14 (Mbit/s)/MHz. The spectral response of the detection system shows the potential to deliver more than 70 Gbit/s of random numbers in our experimental setup.

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“…In particular, Ref. [37] examines the amount of randomness extractable under various levels of characterization of the device and power given to the adversary.…”

Section: Entropy Quantificationmentioning

confidence: 99%

Maximization of Extractable Randomness in a Quantum Random-Number Generator

et al. 2015

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“…It was demonstrated experimentally, see e.g. [7], and finds application in quantum information processing [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Sufficient criterion for guaranteeing that a two-qubit state is unsteerable

et al. 2016

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Quantum steering can be detected via the violation of steering inequalities, which provide sufficient conditions for the steerability of quantum states. Here we discuss the converse problem, namely ensuring that an entangled state is unsteerable, and hence Bell local. We present a simple criterion, applicable to any two-qubit state, which guarantees that the state admits a local hidden state model for arbitrary projective measurements. Specifically, we construct local hidden state models for a large class of entangled states, which can thus not violate any steering or Bell inequality. In turn, this leads to sufficient conditions for a state to be only one-way steerable, and provides the simplest possible example of one-way steering. Finally, by exploiting the connection between steering and measurement incompatibility, we give a sufficient criterion for a continuous set of qubit measurements to be jointly measurable.

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“…The first summation term of the decomposition obtained in (22) has only one main feature, that it may contain steering from B to C, but never from A to C. Hence, it defines the set Σ C A:BC as:…”

Section: Genuine Multipartite Entanglementmentioning

confidence: 99%

Experimental multipartite entanglement and randomness certification of the W state in the quantum steering scenario

Máttar¹,

Skrzypczyk²,

Aguilar³

et al. 2017

Quantum Sci. Technol.

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Recently [Cavalcanti et al. Nat Commun 6, 7941 (2015)] proposed a method to certify the presence of entanglement in asymmetric networks, where some users do not have control over the measurements they are performing. Such asymmetry naturally emerges in realistic situtations, such as in cryptographic protocols over quantum networks. Here we implement such "semi-device independent" techniques to experimentally witness all types of entanglement on a three-qubit photonic W state. Furthermore we analise the amount of genuine randomness that can be certified in this scenario from any bipartition of the three-qubit W state.

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Quantum randomness extraction for various levels of characterization of the devices

Cited by 137 publications

References 65 publications

Maximization of Extractable Randomness in a Quantum Random-Number Generator

Maximization of Extractable Randomness in a Quantum Random-Number Generator

Sufficient criterion for guaranteeing that a two-qubit state is unsteerable

Experimental multipartite entanglement and randomness certification of the W state in the quantum steering scenario

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