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Discrete-modulation measurement-device-independent continuous-variable quantum key distribution with a quantum scissor: exact non-Gaussian calculation

Jafari, K ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1364/OE.452654
  3. Publisher: Optica Publishing Group (formerly OSA) , 2022
  4. Abstract:
  5. In this paper, we study non-Gaussian discrete-modulated measurement-deviceindependent continuous-variable quantum key distribution protocol equipped with a proposed quantum scissor at the receiver side. Our suggested scissor truncates all multiphoton number states with four or more photons and amplifies remaining photon number states in a probabilistic way. Using exact non-Gaussian calculation, we find that quantum scissor meliorates the fidelity and entanglement between two legitimate parties Alice and Bob, at long distances. Therefore, quantum scissor enhances the continuous-variable quantum key distribution protocol range. Examination of the system for different values of the excess noise reveals that this improvement disappears at high noisy channels. © 2022 Optica Publishing Group
  6. Keywords:
  7. Gaussian distribution ; Photons ; Quantum cryptography ; Quantum entanglement ; Tools ; Continuous variables ; Excess noise ; Measurement device ; Multiphotons ; Non-Gaussian ; Number state ; Photon number state ; Probabilistics ; Quantum scissors ; Quantum-key- distribution protocol ; Gaussian noise (electronic) ; Calculation ; Noise ; Photon
  8. Source: Optics Express ; Volume 30, Issue 7 , 2022 , Pages 11400-11423 ; 10944087 (ISSN)
  9. URL: https://opg.optica.org/oe/fulltext.cfm?uri=oe-30-7-11400&id=470653