Correcting for accidental correlations in saturated avalanche photodiodes

Grieve, James A.; Chandrasekara, Rakhitha; Tang, Zhongkan; Cheng, Cliff; Ling, Alexander

doi:10.1364/oe.24.003592

Cited by 11 publications

(13 citation statements)

References 21 publications

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“…Similar observations are also reported in the literature for a commercial Geiger-mode APD that is operated at its saturation regime with passive-quenching circuit [260]. The study models the recovery transition of a typical passively quenched Geiger-mode APD with a few high-level parameters.…”

Section: Device Saturationsupporting

confidence: 82%

Single photon detection and manipulation in photonic integrated circuits

Yanikgonul¹

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I have reviewed the content and presentation style of this thesis and declare it is free of plagiarism and of sufficient grammatical clarity to be examined. To the best of my knowledge, the research and writing are those of the candidate except as acknowledged in the Author Attribution Statement. I confirm that the investigations were conducted in accord with the ethics policies and integrity standards of Nanyang Technological University and that the research data are presented honestly and without prejudice.

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Section: Device Saturationsupporting

confidence: 82%

Single photon detection and manipulation in photonic integrated circuits

Yanikgonul¹

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“…The main effect of this approach is that the quantum bit error rate (QBER) partly becomes a function of the accidental rate of coincident detection between the two detectors. This accidentals rate is given by

[ 21 , 22 ], where

and

are the singles rates observed at the detectors, and

the timing coincidence window.…”

Section: Discussionmentioning

confidence: 99%

Satellite Quantum Communications When Man-in-the-Middle Attacks Are Excluded

Vergoossen

Bedington

Grieve

et al. 2019

Entropy

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An application of quantum communications is the transmission of qubits to create shared symmetric encryption keys in a process called Quantum Key Distribution (QKD). Contrary to publicprivate key encryption, symmetric encryption is safe from (quantum) computing attacks, i.e. it provides forward security and is thus attractive for secure communications. In this paper we argue that for free-space quantum communications, especially with satellites, if one assumes that man-inthe-middle attacks can be detected by classical channel monitoring techniques, simplified quantum communications protocols and hardware systems can be implemented that offer improved key rates. We term these protocols photon key distribution (PKD) to differentiate them from the standard QKD protocols. We identify three types of photon sources and calculate asymptotic secret key rates for PKD protocols and compare them to their QKD counterparts. Results show that PKD protocols have roughly a factor of two higher rates as only one measurement basis is used and due to the relaxed security assumptions can establish keys at very high losses whereas in QKD the privacy amplification process becomes prohibitive.

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“…This circuit has been shown to extend the saturation-free range of GM-APDs up to 600,000 events per second. It is unnecessary to utilize more sophisticated models for estimating the accidental coincidences generated when the detectors are in the saturation regime [37].…”

Section: In-orbit Operation and Performance Comparisonmentioning

confidence: 99%

Generation and Analysis of Correlated Pairs of Photons aboard a Nanosatellite

et al. 2016

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Satellites carrying sources of entangled photons could establish a global quantum network, enabling private encryption keys between any two points on Earth. Despite numerous proposals, demonstration of space-based quantum systems has been limited due to the cost of traditional satellites. We are using very small spacecraft to accelerate progress. We report the in-orbit operation of a photon pair source aboard a 1.65 kg nanosatellite and demonstrate pair generation and polarization correlation under space conditions. The in-orbit photon correlations exhibit a contrast of 97 ± 2%, matching ground-based tests. This pathfinding mission overcomes the challenge of demonstrating in-orbit performance for the components of future entangled photon experiments. Ongoing operation establishes the in-orbit lifetime of these critical components. More generally, this demonstrates the ability for nanosatellites to enable faster progress in space-based research.Progress in quantum computers and their threat to public key cryptography is driving new forms of encryption [1]. One promising alternative is quantum key distribution (QKD) which provides provable security underpinned by quantum physics [2]. In particular, QKD can be achieved using pairs of photons that possess fundamental correlations known as quantum entanglement [3]. Practically, entanglement-based QKD enables a reduction in the number of trusted components [4]. A global quantum network for distributing entangled photon pairs will enable strong encryption keys to be shared between any two points on Earth.Entanglement-based QKD is a mature technology [5][6][7] compared with other entanglement-assisted applications. However, it shares a common range limit with more conventional prepare-send-measure QKD schemes [8]. Metropolitan scale QKD networks are possible using optical fiber or free-space links, but fiber losses and ground-level atmospheric turbulence preclude extending these networks to a global scale. Quantum repeater technology that can overcome these losses is still in the starting stages of being researched [9].Scalable global entanglement distribution can be achieved using a constellation of satellites equipped with spaceto-ground optical links [10]. The technology behind these links are relatively well-documented (e.g. [11][12][13]). Most proposals [14] employ a downlink to minimize transmission loss [15]. A source of photon pairs is placed on board a satellite in Earth orbit that will then either act as a trusted relay between two ground nodes, or beam one photon to one ground station and its pair photon to a different ground station. An additional advantage of space-based entanglement systems is that they allow fundamental tests of the possible overlap between quantum and relativistic regimes for which operation in space is necessary [16].Despite many preliminary studies on space quantum systems [11,12,15,[17][18][19][20][21] there has been limited published work demonstrating relevant technology in space [12,21] due to the prohibitive cost of traditional sp...

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Correcting for accidental correlations in saturated avalanche photodiodes

Cited by 11 publications

References 21 publications

Single photon detection and manipulation in photonic integrated circuits

Single photon detection and manipulation in photonic integrated circuits

Satellite Quantum Communications When Man-in-the-Middle Attacks Are Excluded

Generation and Analysis of Correlated Pairs of Photons aboard a Nanosatellite

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