Alessandro Marcomini

Research on the implementation security of quantum key distribution systems, including prepare-and-measure and twin-field architectures, with emphasis on imperfect devices, statistical modelling, and practically relevant security proofs.

Worked on numerical optimisation tools for multi-qubit gates, demonstrating the usefulness of an experimentally motivated figure of merit for efficient CNOT calibration in NV centers.

Contributed to the alignment and completion of a magneto-optical trap for atoms, gaining hands-on experience in experimental atomic physics.

Studied the applicability of QKD techniques to more general quantum network structures in a conference key agreement setting. Group leader: Prof. David Elkouss.

Worked on the parallelism between quantum and post-quantum cryptographic primitives for hybrid quantum-classical protocols. Group leader: Prof. Dr. Kathrin Hövelmanns.

Contributed to the experimental design and theoretical security analysis of fully phase-randomised QKD sources based on superluminescent diodes. Group leader: Prof. Boris Korzh.

Analysed the applicability of quantum network techniques for high-quality characterisation of quantum states in cryptographic settings. Group leader: Dr. Koji Azuma.

Studied experimental security aspects of twin-field QKD based on optical injection locking, identifying novel hacking techniques and possible countermeasures. Group leader: Dr. Robert I. Woodward.

Worked on the theoretical extension of the loss-tolerant QKD protocol to relax balanced detector-efficiency assumptions. Group leader: Prof. Kiyoshi Tamaki.

Reference-beam attacks against OIL-based Twin-Field QKD (QCrypt 2026, University of Ottawa); Implementation Security of TF-QKD: Fast Intensity Modulation of the Reference Light Attack and Countermeasures (International Conference on Quantum Communication and Security, DIM QuanTiP, 2026); On the Implementation Security of Twin-Field Quantum Key Distribution using Optical Injection Locking (XI Workshop do Programa de Doutoramento Interuniversitario en Láser, Fotónica e Visión, 2026); Towards a Unified Security Proof for Prepare-and-Measure Quantum Key Distribution (QSI Workshop, Technical University of Denmark, 2025); Loss-Tolerant Quantum Key Distribution with Detection Efficiency Mismatch (X Workshop do Programa de Doutoramento Interuniversitario en Láser, Fotónica e Visión, 2025).

Security of Loss-Tolerant QKD with Source and Receiver Imperfections (QCrypt 2025, University of Science and Technology of China); Experimental Characterisation of Second-Order Phase Correlations in Gain-Switched Laser Sources for Decoy-State QKD (QCrypt 2024, Universidade de Vigo); Characterising Higher-Order Phase Correlations in Gain-Switched Laser Sources with Application to Decoy-State QKD (Plan Complementario de Comunicaciones Cuánticas, 2023; QCrypt 2023, University of Maryland Institute for Advanced Computer Studies).