pith. sign in

arxiv: 0812.4246 · v1 · submitted 2008-12-22 · 🪐 quant-ph

Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation

classification 🪐 quant-ph
keywords distributioncontinuous-variablediscretemodulationprotocolquantumreconciliationreverse
0
0 comments X
read the original abstract

We present a continuous-variable quantum key distribution protocol combining a discrete modulation and reverse reconciliation. This protocol is proven unconditionally secure and allows the distribution of secret keys over long distances, thanks to a reverse reconciliation scheme efficient at very low signal-to-noise ratio.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Finite-size general security for differential phase shift keying via variable-length quantum key distribution

    quant-ph 2026-05 unverdicted novelty 7.0

    Finite-size general security for DPSK QKD is achieved with positive key rates for 10^5 signals beyond 12 dB loss via variable-length entropy accumulation and conic optimization.

  2. High-Rate Free-Space Continuous-Variable QKD with Self-Referenced Passive State Preparation

    quant-ph 2026-04 unverdicted novelty 6.0

    Self-referenced PSP with LLO enables CVQKD to achieve 10.34 Mbps asymptotic secret key rate over up to 23.5 dB free-space loss with low excess noise and turbulence robustness.

  3. High-Rate Free-Space Continuous-Variable QKD with Self-Referenced Passive State Preparation

    quant-ph 2026-04 unverdicted novelty 6.0

    A self-referenced LLO CVQKD system with passive state preparation achieves 10.34 Mbps asymptotic secret key rate over 23.5 dB loss free-space channel with low excess noise and turbulence robustness.

  4. High-key-rate Fully-Passive Quantum Access Network with Thermal Source

    quant-ph 2026-04 unverdicted novelty 5.0

    A fully passive quantum access network with thermal sources and passive state preparation achieves 19.48 Mbps key rate per unit while extending CVQKD to point-to-multipoint setups.

  5. Optimization of CV-QKD Under Practical Constraints

    cs.IT 2026-05 unverdicted novelty 4.0

    Reinforcement learning optimizes CV-QKD under practical constraints of limited FIR filters, photon number, and DAC/ADC resolution, delivering significant performance gains.