Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis
arXiv:1910.04431 · doi:10.1038/s41598-020-66948-0
Abstract
In this paper we report a continuous-variable quantum key distribution protocol using multimode coherent states generated on subcarrier frequencies of the optical spectrum. To detect the quadrature components of bosonic field we propose a coherent detection scheme where power from a carrier wave is used as a local oscillator. We compose a mathematical model of the proposed scheme and perform its security analysis in the finite-size regime using fully quantum asymptotic equipartition property technique. We calculate a lower bound on the secret key rate for the system under the assumption that the quantum channel noise is negligible compared to detector dark counts, and an eavesdropper is restricted to collective attacks. Our calculation shows that the current realistic system implementation would allow distributing secret keys over channels with losses up to 9 dB.
arXiv comment11 pages, 6 figures
References in corpus (34)
- Quantum cryptography: Public key distribution and coin tossing
- The Security of Practical Quantum Key Distribution
- Simple Proof of Security of the BB84 Quantum Key Distribution Protocol
- Decoy State Quantum Key Distribution
- Unconditional Security Of Quantum Key Distribution Over Arbitrarily Long Distances
- Continuous variable quantum cryptography using coherent states
- Quantum key distribution using gaussian-modulated coherent states
- Distillation of secret key and entanglement from quantum states
- An information-theoretic security proof for QKD protocols
- Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
- Quantum Distribution of Gaussian Keys with Squeezed States
- Post-selection technique for quantum channels with applications to quantum cryptography
- Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations
- Lower and upper bounds on the secret key rate for QKD protocols using one--way classical communication
- A Fully Quantum Asymptotic Equipartition Property
- Continuous variable quantum key distribution with two-mode squeezed states
- Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
- Unconditionally Secure Key Distribution Based on Two Nonorthogonal States
- Simple and tight device-independent security proofs
- Quantum cryptography using balanced homodyne detection
- Asymptotic security of continuous-variable quantum key distribution with a discrete modulation
- Quantum Phase Gate Operation Based on Nonlinear Optics: Full Quantum Analysis
- A Generic Security Proof for Quantum Key Distribution
- Efficiency of coherent state quantum cryptography in the presence of loss: Influence of realistic error correction
- A security proof of continuous-variable QKD using three coherent states
- Security of subcarrier wave quantum key distribution against the collective beam-splitting attack
- Multi-channel parallel continuous variable quantum key distribution with Gaussian modulation
- Experimental Demonstration of Post-Selection based Continuous Variable Quantum Key Distribution in the Presence of Gaussian Noise
- Quantum key distribution with phase-encoded coherent states: Asymptotic security analysis in thermal-loss channels
- Mass-polariton theory of sharing the total angular momentum of light between the field and matter
- Algebraic approach to electro-optic modulation of light: Exactly solvable multimode quantum model
- Overcoming unambiguous state discrimination attack with the help of Schrödinger Cat decoy states
- Using a Heterodyne Detection Scheme in a Subcarrier Wave Quantum Communication System
- Finite-key security for quantum key distribution systems utilizing weak coherent states
Cited by in corpus (5)
- Finite-size security of continuous-variable quantum key distribution with digital signal processing
- Coherent detection schemes for subcarrier wave continuous variable quantum key distribution
- Quantum repeater via entangled phase modulated multimode coherent states
- Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution
- Photonic interface between subcarrier wave and dual rail encodings