Analysis of time-correlated single photon detection in a multi-wavelength quantum key distribution network

2005 ◽  
Author(s):  
A.C. Beal ◽  
P.D. Kumavor ◽  
B.C. Wang ◽  
S.F. Yelin
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Distribution Network ◽  
Key Distribution ◽  
Single Photon Detection ◽  
Photon Detection ◽  
Multi Wavelength

Single-photon detection in time-of-flight-depth imaging and quantum key distribution

2011 ◽  
Author(s):  
Gerald S. Buller ◽  
Robert J. Collins ◽  
Patrick J. Clarke ◽  
Nils J. Krichel ◽  
Aongus McCarthy ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Time Of Flight ◽  
Key Distribution ◽  
Single Photon Detection ◽  
Photon Detection ◽  
Depth Imaging

scholarly journals Phase Matching Quantum Key Distribution based on Single-Photon Entanglement

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Wei Li ◽  
Le Wang ◽  
Shengmei Zhao
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Key Distribution ◽  
Phase Matching ◽  
Single Photon Detection ◽  
Beam Splitting ◽  
Long Distance ◽  
Photon Detection ◽  
Security Proof ◽  
Simulation Results

Abstract Two time-reversal quantum key distribution (QKD) schemes are the quantum entanglement based device-independent (DI)-QKD and measurement-device-independent (MDI)-QKD. The recently proposed twin field (TF)-QKD, also known as phase-matching (PM)-QKD, has improved the key rate bound from O(η) to O$$(\sqrt{{\boldsymbol{\eta }}})$$ ( η ) with η the channel transmittance. In fact, TF-QKD is a kind of MDI-QKD but based on single-photon detection. In this paper, we propose a different PM-QKD based on single-photon entanglement, referred to as single-photon entanglement-based phase-matching (SEPM)-QKD, which can be viewed as a time-reversed version of the TF-QKD. Detection loopholes of the standard Bell test, which often occur in DI-QKD over long transmission distances, are not present in this protocol because the measurement settings and key information are the same quantity which is encoded in the local weak coherent state. We give a security proof of SEPM-QKD and demonstrate in theory that it is secure against all collective attacks and beam-splitting attacks. The simulation results show that the key rate enjoys a bound of O$$(\sqrt{{\boldsymbol{\eta }}})$$ ( η ) with respect to the transmittance. SEPM-QKD not only helps us understand TF-QKD more deeply, but also hints at a feasible approach to eliminate detection loopholes in DI-QKD for long-distance communications.

scholarly journals Hacking on decoy-state quantum key distribution system with partial phase randomization

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Shi-Hai Sun ◽  
Mu-Sheng Jiang ◽  
Xiang-Chun Ma ◽  
Chun-Yan Li ◽  
Lin-Mei Liang
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Key Distribution ◽  
Single Photon Detection ◽  
Linear Optics ◽  
Photon Detection ◽  
Decoy State ◽  
Partial Phase ◽  
Phase Randomization

Abstract Quantum key distribution (QKD) provides means for unconditional secure key transmission between two distant parties. However, in practical implementations, it suffers from quantum hacking due to device imperfections. Here we propose a hybrid measurement attack, with only linear optics, homodyne detection and single photon detection, to the widely used vacuum + weak decoy state QKD system when the phase of source is partially randomized. Our analysis shows that, in some parameter regimes, the proposed attack would result in an entanglement breaking channel but still be able to trick the legitimate users to believe they have transmitted secure keys. That is, the eavesdropper is able to steal all the key information without discovered by the users. Thus, our proposal reveals that partial phase randomization is not sufficient to guarantee the security of phase-encoding QKD systems with weak coherent states.

scholarly journals Superconducting nanowire single-photon detection system and demonstration in quantum key distribution

2013 ◽  
Vol 58 (10) ◽  
pp. 1145-1149 ◽  
Author(s):  
SiJing Chen ◽  
DengKuan Liu ◽  
LiXing You ◽  
YongLiang Wang ◽  
LongQing Qiu ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Detection System ◽  
Key Distribution ◽  
Single Photon Detection ◽  
Photon Detection ◽  
Superconducting Nanowire

scholarly journals Single-Photon Detection Module Based on Large-Area Silicon Photomultipliers for Time-Domain Diffuse Optics

Instruments ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 18
Author(s):  
Fabio Acerbi ◽  
Anurag Behera ◽  
Alberto Dalla Mora ◽  
Laura Di Sieno ◽  
Alberto Gola
Keyword(s):  
Time Resolution ◽  
Time Domain ◽  
Single Photon ◽  
Building Blocks ◽  
The Body ◽  
Single Photon Detection ◽  
Silicon Photomultipliers ◽  
Photon Detection ◽  
Instrument Response Function ◽  
Diffuse Optics

Silicon photomultipliers (SiPM) are pixelated single-photon detectors combining high sensitivity, good time resolution and high dynamic range. They are emerging in many fields, such as time-domain diffuse optics (TD-DO). This is a promising technique in neurology, oncology, and quality assessment of food, wood, and pharmaceuticals. SiPMs can have very large areas and can significantly increase the sensitivity of TD-DO in tissue investigation. However, such improvement is currently limited by the high detector noise and the worsening of SiPM single-photon time resolution due to the large parasitic capacitances. To overcome such limitation, in this paper, we present two single-photon detection modules, based on 6 × 6 mm2 and 10 × 10 mm2 SiPMs, housed in vacuum-sealed TO packages, cooled to −15 °C and −36 °C, respectively. They integrate front-end amplifiers and temperature controllers, being very useful instruments for TD-DO and other biological and physical applications. The signal extraction from the SiPM was improved. The noise is reduced by more than two orders of magnitude compared to the room temperature level. The full suitability of the proposed detectors for TD-DO measurements is outside the scope of this work, but preliminary tests were performed analyzing the shape and the stability of the Instrument Response Function. The proposed modules are thus fundamental building blocks to push the TD-DO towards deeper investigations inside the body.

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