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Distribution of non-Gaussian states in a deployed telecommunication fiber channel
Casper A. Breum, Xueshi Guo, Mikkel V. Larsen, Shigehito Miki, Hirotaka Terai, Ulrik L. Andersen, Jonas S. Neergaard-Nielsen
https://arxiv.org/abs/2509.18080

Distribution of non-Gaussian states in a deployed telecommunication fiber channel
Optical non-Gaussian states hold great promise as a pivotal resource for advanced optical quantum information processing and fault-tolerant long-distance quantum communication. Establishing their faithful transmission in a real-world communication channel, therefore, marks an important milestone. In this study, we experimentally demonstrate the distribution of such non-Gaussian states in a functioning telecommunication channel that connects separate buildings within the DTU campus premises. We …

Geometrically expanding the BPS vortex of a non-canonical multi-field theory
F. C. E. Lima
https://arxiv.org/abs/2510.03237 https://arxiv.org/pdf/2510.0323…

Geometrically expanding the BPS vortex of a non-canonical multi-field theory
Considering a non-canonical multi-field theory, we propose a mechanism of geometric expansion for Abrikosov-Nielsen-Olesen (ANO) vortices. One builds the general setup adopting a non-canonical O(3)-sigma model, non-minimally coupled through an anomalous magnetic dipole interaction to a gauge and real scalar field. By embracing a hyperbolic non-canonical extension, one finds that self-dual vortex configurations undergo geometric expansion, deforming ANO-like vortices into disk-like structures, m…

Digital Signal Processing from Classical Coherent Systems to Continuous-Variable QKD: A Review of Cross-Domain Techniques, Applications, and Challenges
Davi Juv\^encio Gomes de Sousa, Caroline da Silva Morais Alves, Val\'eria Loureiro da Silva, Nelson Alves Ferreira Neto
https://arxiv.org/abs/2509.20141…

Digital Signal Processing from Classical Coherent Systems to Continuous-Variable QKD: A Review of Cross-Domain Techniques, Applications, and Challenges
This systematic review investigates the application of digital signal processing (DSP) techniques -- originally developed for coherent optical communication systems to continuous-variable quantum key distribution (CV-QKD). The convergence of these domains has enabled significant advances in CV-QKD performance, particularly in phase synchronization, polarization tracking, and excess noise mitigation. To provide a comprehensive and reproducible synthesis of this emerging field, we employed the AP…