Giuseppe Vallone

@article{Rossi2026,

title = {Intermodal quantum key distribution over an 18-km free-space channel with adaptive optics and room-temperature detectors},

author = {Edoardo Rossi and Ilektra Karakosta-Amarantidou and Matteo Padovan and Marco Nardi and Marco Avesani and Francesco B. L. Santagiustina and Marco Taffarello and Antonio Vanzo and Stefano Bonora and Giuseppe Vallone and Paolo Villoresi and Francesco Vedovato},

doi = {10.1038/s41534-026-01358-0},

issn = {2056-6387},

year  = {2026},

date = {2026-08-26},

journal = {npj Quantum Inf},

publisher = {Springer Science and Business Media LLC},

abstract = {Abstract

                  Intermodal quantum key distribution at telecom wavelengths provides a hybrid interface between fiber connections and free-space links, both essential for the realization of scalable and interoperable quantum networks. Although demonstrated over short-range free-space links, long-distance implementations of intermodal quantum key distribution remain challenging, due to turbulence-induced wavefront aberrations which limit efficient single-mode fiber coupling at the optical receiver. Here, we demonstrate a real-time intermodal quantum key distribution field trial over an 18-km free-space link, connecting a remote terminal to an urban optical ground station equipped with a 40-cm-class telescope. An adaptive optics system, implementing direct wavefront sensing and high-order aberration correction, enables efficient single-mode fiber coupling and allows secure key generation of 200 bit/s using a compact state analyzer equipped with room temperature detectors. We further validate through experimental data a turbulence-based model for predicting fiber coupling efficiency, providing practical design guidelines for future intermodal quantum networks.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Scalcon:26,

title = {Versatile wavelength-division multiplexed quantum key distribution network operating simultaneously in the O and C bands},

author = { Davide Scalcon and Matteo Padovan and Paolo Villoresi and Giuseppe Vallone and Marco Avesani},

url = {https://opg.optica.org/opticaq/abstract.cfm?URI=opticaq-4-4-353},

doi = {10.1364/OPTICAQ.579856},

year  = {2026},

date = {2026-08-01},

journal = {Optica Quantum},

volume = {4},

number = {4},

pages = {353–358},

publisher = {Optica Publishing Group},

abstract = {Ongoing technological progress is accelerating the commercial and global-scale deployment of Quantum Key Distribution (QKD). Its ability to enable unconditionally secure communication is expected to be a key feature of future telecommunication networks, and practical demonstrations of QKD network implementations in real-world environments are crucial for ensuring reliable adoption. In this work, we demonstrate a four-node photonic QKD network that employs versatile and cost-effective wavelength-division multiplexing across three transmitters in the O- and C-bands to simultaneously distribute quantum-secure keys among all nodes. Specifically, the broadband central receiver node shares all optical and electronic decoding components, except for the single-photon detectors, across the three QKD links, significantly reducing system costs and enhancing compactness.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Bolanos:26,

title = {GHz-rate polarization-based QKD system for fiber and free-space applications},

author = { Matías R. Bolaños and Edoardo Rossi and Federico Berra and Alberto De Toni and Ilektra Karakosta-Amarantidou and Daniel C. Lawo and Costantino Agnesi and Marco Avesani and Andrea Stanco and Francesco Vedovato and Paolo Villoresi and Giuseppe Vallone},

url = {https://opg.optica.org/opticaq/abstract.cfm?URI=opticaq-4-4-389},

doi = {10.1364/OPTICAQ.596140},

year  = {2026},

date = {2026-08-01},

journal = {Optica Quantum},

volume = {4},

number = {4},

pages = {389–396},

publisher = {Optica Publishing Group},

abstract = {Quantum key distribution (QKD) enables secret-key exchange based on quantum mechanics but faces challenges from channel loss, noise, and finite-key effects that limit large-scale deployment. We present a 1550-nm efficient-BB84 system based on the iPOGNAC scheme operating at repetition rates up to 1.5 GHz with an intrinsic QBER of ∼0.4%. The system was validated on both laboratory fiber and a field intermodal link, including a 620 m daylight free-space channel, synchronized using the Qubit4Sync algorithm. The experiment achieved a sustained free-space secure key rate above 1 Mb/s for one hour, representing a new, to our knowledge, performance benchmark for free-space quantum key distribution (QKD). Using improved finite-size bounds, secure rates of 6.5 kb/s at 38.5 dB were demonstrated, highlighting suitability for high-loss scenarios, such as satellite-to-ground links.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{q2sy-sw7h,

title = {General model and modulation strategies for Sagnac-based encoders},

author = { Federico Berra and Mat'{ı}as Rubén Bolaños and Alberto De Toni and Kannan Vijayadharan and Costantino Agnesi and Marco Avesani and Andrea Stanco and Paolo Villoresi and Giuseppe Vallone},

url = {https://link.aps.org/doi/10.1103/q2sy-sw7h},

doi = {10.1103/q2sy-sw7h},

year  = {2026},

date = {2026-07-01},

journal = {Phys. Rev. Res.},

volume = {8},

issue = {3},

pages = {033069},

publisher = {American Physical Society},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{bgdd-1vl9,

title = {Security against Trojan-horse attacks on a self-compensating all-fiber polarization modulator},

author = { Alberto De Toni and Aynur Cemre Aka and Costantino Agnesi and Davide Giacomo Marangon and Giuseppe Vallone and Paolo Villoresi},

url = {https://link.aps.org/doi/10.1103/bgdd-1vl9},

doi = {10.1103/bgdd-1vl9},

year  = {2026},

date = {2026-05-01},

journal = {Phys. Rev. A},

volume = {113},

issue = {5},

pages = {052420},

publisher = {American Physical Society},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{10.1117/1.AP.8.1.016009,

title = {High-performance heterodyne receiver for quantum information processing in a laser-written integrated photonic platform},

author = { Andrea Peri and Giulio Gualandi and Tommaso Bertapelle and Mattia Sabatini and Giacomo Corrielli and Yoann Piétri and Davide Giacomo Marangon and Giuseppe Vallone and Paolo Villoresi and Roberto Osellame and Marco Avesani},

url = {https://doi.org/10.1117/1.AP.8.1.016009},

doi = {10.1117/1.AP.8.1.016009},

year  = {2026},

date = {2026-01-01},

journal = {Advanced Photonics},

volume = {8},

number = {1},

pages = {016009},

publisher = {SPIE},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Coccia_Padovan_Pompermaier_Sabatini_Avesani_Marangon_Villoresi_Vallone_2026,

title = {Quantum bounds and device-independent security with rank-one qubit measurements},

author = { Lorenzo Coccia and Matteo Padovan and Andrea Pompermaier and Mattia Sabatini and Marco Avesani and Davide G. Marangon and Paolo Villoresi and Giuseppe Vallone},

doi = {10.1038/s41534-025-01175-x},

year  = {2026},

date = {2026-01-01},

urldate = {2026-01-01},

journal = {npj Quantum Information},

volume = {12},

number = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{vijayadharan2025Sagnacbaseda,

title = {A Sagnac-based Arbitrary Time-Bin State Encoder for Quantum Communication Applications},

author = { Kannan Vijayadharan and Matías Rubén Bola{ñ}os and Marco Avesani and Giuseppe Vallone and Paolo Villoresi and Costantino Agnesi},

doi = {10.1140/epjqt/s40507-025-00428-0},

issn = {2662-4400, 2196-0763},

year  = {2025},

date = {2025-12-01},

urldate = {2026-02-15},

journal = {EPJ Quantum Technol.},

volume = {12},

number = {1},

pages = {129},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{mohageg2025Satellite,

title = {Towards Satellite Tests Combining General Relativity and Quantum Mechanics through Quantum Optical Interferometry: Progress on the Deep Space Quantum Link},

author = { Makan Mohageg and Charis Anastopoulos and Olivia Brasher and Jason Gallicchio and Bei Lok Hu and Thomas Jennewein and Spencer Johnson and Shih-Yuin Lin and Alexander Ling and Alexander Lohrmann and Christoph Marquardt and Luca Mazzarella and Matthias Meister and Raymond Newell and Albert Roura and Giuseppe Vallone and Paolo Villoresi and Lisa Wörner and Paul Kwiat},

doi = {10.1140/epjqt/s40507-025-00370-1},

issn = {2662-4400, 2196-0763},

year  = {2025},

date = {2025-12-01},

urldate = {2026-02-15},

journal = {EPJ Quantum Technol.},

volume = {12},

number = {1},

pages = {78},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{picciariello2025Intermodal,

title = {Intermodal Quantum Key Distribution Field Trial with Active Switching between Fiber and Free-Space Channels},

author = { Francesco Picciariello and Ilektra {Karakosta-Amarantidou} and Edoardo Rossi and Marco Avesani and Giulio Foletto and Luca Calderaro and Giuseppe Vallone and Paolo Villoresi and Francesco Vedovato},

doi = {10.1140/epjqt/s40507-025-00306-9},

issn = {2662-4400, 2196-0763},

year  = {2025},

date = {2025-12-01},

urldate = {2026-02-15},

journal = {EPJ Quantum Technol.},

volume = {12},

number = {1},

pages = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{finazzi2025Radiation,

title = {Radiation Hardness Properties and DCR Reduction via Laser Annealing of InGaAs/InP SPADs for Space Applications},

author = { Lorenzo Finazzi and Fabio Signorelli and Marta Bagatin and Simone Gerardin and Mujtaba Zahidy and Giuseppe Vallone and Thomas Jennewein and Paolo Villoresi and Alberto Tosi},

doi = {10.1364/OE.565872},

issn = {1094-4087},

year  = {2025},

date = {2025-11-01},

urldate = {2026-02-15},

journal = {Opt. Express},

volume = {33},

number = {23},

pages = {47876},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{lopesdacosta2025Powerconsumption,

title = {Power-Consumption Back Door in Quantum Key Distribution},

author = { Beatriz Lopes Da Costa and Matías R. Bola{ñ}os and Ricardo Chaves and Claudio Narduzzi and Marco Avesani and Davide Giacomo Marangon and Andrea Stanco and Giuseppe Vallone and Paolo Villoresi and Yasser Omar},

doi = {10.1103/f92x-c3zj},

issn = {2331-7019},

year  = {2025},

date = {2025-11-01},

urldate = {2026-02-15},

journal = {Phys. Rev. Applied},

volume = {24},

number = {5},

pages = {054004},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{giacomin2025Passive,

title = {A Passive and Self-Characterizing Cross-Encoded Receiver for Reference-Frame-Independent Quantum Key Distribution},

author = { Massimo Giacomin and Francesco B. L. Santagiustina and Giuseppe Vallone and Paolo Villoresi and Costantino Agnesi},

doi = {10.1364/OPTICAQ.552059},

issn = {2837-6714},

year  = {2025},

date = {2025-08-01},

urldate = {2026-02-15},

journal = {Optica Quantum},

volume = {3},

number = {4},

pages = {389},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{sabatini2025Hybrid,

title = {Hybrid Encoder for Discrete and Continuous Variable QKD},

author = { Mattia Sabatini and Tommaso Bertapelle and Paolo Villoresi and Giuseppe Vallone and Marco Avesani},

doi = {10.1002/qute.202400522},

issn = {2511-9044, 2511-9044},

year  = {2025},

date = {2025-08-01},

urldate = {2026-02-15},

journal = {Adv Quantum Tech},

volume = {8},

number = {8},

pages = {2400522},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{xavier2025Energytime,

title = {Energy-Time and Time-Bin Entanglement: Past, Present and Future},

author = { Guilherme B. Xavier and Jan-Åke Larsson and Paolo Villoresi and Giuseppe Vallone and Adán Cabello},

doi = {10.1038/s41534-025-01072-3},

issn = {2056-6387},

year  = {2025},

date = {2025-07-01},

urldate = {2026-02-15},

journal = {npj Quantum Inf},

volume = {11},

number = {1},

pages = {129},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{scalcon2025Lowerrora,

title = {Low-Error Encoder for Time-Bin and Decoy States for Quantum Key Distribution},

author = { Davide Scalcon and Elisa Bazzani and Giuseppe Vallone and Paolo Villoresi and Marco Avesani},

doi = {10.1038/s41534-024-00923-9},

issn = {2056-6387},

year  = {2025},

date = {2025-02-01},

urldate = {2026-02-15},

journal = {npj Quantum Inf},

volume = {11},

number = {1},

pages = {22},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{bertapelle2025Highspeed,

title = {High-Speed Source-Device-Independent Quantum Random Number Generator on a Chip},

author = { Tommaso Bertapelle and Marco Avesani and Alberto Santamato and Alberto Montanaro and Marco Chiesa and Davide Rotta and Massimo Artiglia and Vito Sorianello and Francesco Testa and Gabriele De Angelis and Giampiero Contestabile and Giuseppe Vallone and Marco Romagnoli and Paolo Villoresi},

doi = {10.1364/OPTICAQ.529746},

issn = {2837-6714},

year  = {2025},

date = {2025-02-01},

urldate = {2026-02-15},

journal = {Optica Quantum},

volume = {3},

number = {1},

pages = {111},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{bolanos2025TimetoDigitala,

title = {A Time-to-Digital Converter With Steady Calibration Through Single-Photon Detection},

author = { Matías Rubén Bola{ñ}os and Daniele Vogrig and Paolo Villoresi and Giuseppe Vallone and Andrea Stanco},

doi = {10.1109/TIM.2025.3601244},

issn = {0018-9456, 1557-9662},

year  = {2025},

date = {2025-01-01},

urldate = {2026-02-15},

journal = {IEEE Trans. Instrum. Meas.},

volume = {74},

pages = {1–9},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{agnesi2024Infielda,

title = {In-field Comparison between G.652 and G.655 Optical Fibres for Polarisation-based Quantum Key Distribution},

author = { Costantino Agnesi and Massimo Giacomin and Daniele Sartorato and Silvia Artuso and Giuseppe Vallone and Paolo Villoresi},

doi = {10.1049/qtc2.12095},

issn = {2632-8925, 2632-8925},

year  = {2024},

date = {2024-12-01},

urldate = {2026-02-15},

journal = {IET Quantum Communication},

volume = {5},

number = {4},

pages = {567–574},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{bazzani2024High,

title = {High Directional Optical Transmitter with Phased Array of Nanoptical Emitters and Efficient Error Correction for Long Distance Space Communications},

author = { Elisa Bazzani and Anna Valeria Guglielmi and Roberto Corvaja and Nicola Laurenti and Filippo Romanato and Gianluca Ruffato and Andrea Vogliardi and Giuseppe Vallone and Lorenzo Vangelista and Paolo Villoresi},

doi = {10.1103/PhysRevResearch.6.043266},

issn = {2643-1564},

year  = {2024},

date = {2024-12-01},

urldate = {2026-02-15},

journal = {Phys. Rev. Research},

volume = {6},

number = {4},

pages = {043266},

keywords = {},

pubstate = {published},

tppubtype = {article}

}