Nonclassicality and entanglement of single-photon catalysis-assisted two-mode squeezed coherent state

Ye, Wei; Zhang, Huan; Wei, Chaoping; Zhong, Hai; Xia, Ying; Hu, Li-Yun; Guo, Ying

doi:10.1016/j.optcom.2020.126103

Cited by 9 publications

(4 citation statements)

References 29 publications

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“…Continuousvariable (CV) QKD is another approach to actualizing QKD [8][9][10][11][12][13]. It has the advantage of convenient implementations, as it can be performed with diversification of sources such as coherent state [14] and squeezed state [15]. Nonetheless, CVQKD also faces threats of the practical security [16][17][18], resulting from device imperfections, technical deficiencies, and operational imperfections [10,19,20].…”

Section: Introductionmentioning

confidence: 99%

Counteracting a Saturation Attack in Continuous-Variable Quantum Key Distribution Using an Adjustable Optical Filter Embedded in Homodyne Detector

Mao

et al. 2022

Entropy

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A saturation attack can be employed for compromising the practical security of continuous-variable quantum key distribution (CVQKD). In this paper, we suggest a countermeasure approach to resisting this attack by embedding an adjustable optical filter (AOF) in the CVQKD system. Numerical simulations illustrate the effects of the AOF-enabled countermeasure on the performance in terms of the secret key rate and transmission distance. The legal participants can trace back the information that has been eavesdropped by an attacker from the imperfect receiver, which indicates that this approach can be used for defeating a saturation attack in practical quantum communications.

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Section: Introductionmentioning

confidence: 99%

Counteracting a Saturation Attack in Continuous-Variable Quantum Key Distribution Using an Adjustable Optical Filter Embedded in Homodyne Detector

Mao

et al. 2022

Entropy

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“…Continuous-variable (CV) QKD is another useful approach to conducting QKD [5][6][7][8][9]. It has an advantage of practical implementations, as it can be conveniently performed with coherent state [10] and squeezed state [11]. Unfortunately, it may face threats of the practical security [12][13][14], resulting from imperfect devices [15].…”

Section: Introductionmentioning

confidence: 99%

Practical security of continuous-variable quantum key distribution involving saturation attack with finite-size analysis

Yun¹,

Li²,

Guo³

2022

J. Phys. A: Math. Theor.

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Saturation attack of imperfect detectors compromises the practical security of continuous-variable quantum key distribution (CVQKD) in implementations. In this paper, we demonstrate the practical security of the CVQKD system with finite-size analysis when considering effects of saturation attack on imperfect detectors at the receiver. We suggest an approach to resisting this attack by embedding an adjustable optical filter in the detector, motivated by characteristics of saturation attack. Numerical simulations illustrate the practical security of the system with finite-size analysis in terms of the achieved secret key rate and maximal transmission distance. It indicates that this approach can be elegantly used for defeating the potential saturation attack in practical quantum networks.

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“…Despite the aforementioned advantages, the success probability of implementing photonsubtracted operations is less than 0.25, which would lead to limited performance improvements [35,36]. To eliminate this drawback, recently, quantum catalysis (QC) [35][36][37][38][39][40][41] has been viewed as another useful method to extend the maximal transmission distance of the MDI-CVQKD system [42], compared with the single-photon subtraction case. Unfortunately, a major problem, common to the aforementioned GM CVQKD, is that the reconciliation efficiency β is low, especially in long-distance transmission with a low signal-to-noise ratio.…”

Section: Introductionmentioning

confidence: 99%

Enhancing discrete-modulated continuous-variable measurement-device-independent quantum key distribution via quantum catalysis

Ye¹,

Guo²,

Zhang³

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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Discrete modulation can make up for the shortage of transmission distance in measurement-device-independent continuous-variable quantum key distribution (MDI-CVQKD), providing a unique advantage against all side-channel attacks but also creating a challenge for further performance improvement. Here we suggest a quantum catalysis (QC) approach for enhancing the performance of the discrete-modulated (DM) MDI-CVQKD in terms of the achievable secret key rate and lengthening the maximal transmission distance. The numerical simulation results show that the QC-based MDI-CVQKD with discrete modulation, involving a zero-photon catalysis (ZPC) operation, can not only obtain a higher secret key rate than the original DM protocol, but also contribute to a reasonable increase of the corresponding optimal variance. As for the extreme asymmetric and symmetric cases, the secret key rate and maximal transmission distance of the ZPC-involved DM MDI-CVQKD system can be further improved under the same parameters. This approach enables the system to tolerate lower reconciliation efficiency, which may provide excellent potential for practical implementations with state-of-art technology.

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Nonclassicality and entanglement of single-photon catalysis-assisted two-mode squeezed coherent state

Cited by 9 publications

References 29 publications

Counteracting a Saturation Attack in Continuous-Variable Quantum Key Distribution Using an Adjustable Optical Filter Embedded in Homodyne Detector

Counteracting a Saturation Attack in Continuous-Variable Quantum Key Distribution Using an Adjustable Optical Filter Embedded in Homodyne Detector

Practical security of continuous-variable quantum key distribution involving saturation attack with finite-size analysis

Enhancing discrete-modulated continuous-variable measurement-device-independent quantum key distribution via quantum catalysis

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