High-dimensional autocompensating discrete modulation CV-QKD protocol in optical fibers
- URL: http://arxiv.org/abs/2508.10442v1
- Date: Thu, 14 Aug 2025 08:29:24 GMT
- Title: High-dimensional autocompensating discrete modulation CV-QKD protocol in optical fibers
- Authors: Alexandre Vázquez-Martínez, Xesús Prieto-Blanco, Eduardo F. Mateo, Jesús Liñares,
- Abstract summary: We use N-dimensional product states of weak coherent states that undergo perturbations along optical fibers.<n>We analyze the security of this high-dimensional protocol when an intercept and resend attack is implemented.
- Score: 41.94295877935867
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this work we present a high-dimensional discrete modulated CV-QKD protocol, with dimension 2N , in optical fibers, where N is the number of optical modes. We use N-dimensional product states of weak coherent states that undergo perturbations along optical fibers and that are cancelled in a passive way (autocompensation) and then measured by a standard balanced homodyne detection. We analyze the security of this high-dimensional protocol when an intercept and resend attack is implemented with simultaneous homodyne measurement in both quadratures and the resulting secure key gains are calculated showing a significative increase with dimension.
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