QD-E-QKD
Quantum Dots for Entanglement-based Quantum Key Distribution (QD-E-QKD) is a multidisciplinary project bringing together experts in quantum optics, solid state physics, quantum key distribution and quantum communication.
The project is funded within the QuantERA II Programme that has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No 101017733.
Motivation and vision: Entanglement is a fundamental ingredient for extending quantum key distribution from two-party communication to networks without trusted nodes. Yet, the commercial application of this concept is currently hindered by the probabilistic nature of the photon-generation process underlying the used entanglement resources. QD-E-QKD will develop a novel technology based on semiconductor quantum dots and test it in realistic urban communication scenarios to surpass the limits of current approaches to entanglement-based quantum key distribution.
CONSORTIUM
Armando Rastelli
Johannes Kepler University / Institute of Semiconductor & Solid State Physics, Austria
Stefano Bonora
CNR/INFN Padova, Italy
Thomas Scheidl
Martin Bohmann
Quantum Technology Laboratories GmbH, Austria
Vladyslav Usenko
Palacký University, Olomouc, Faculty of Science, Czech Republic
Tobias Huber-Loyola
Julius Maximilian Universität Würzburg / Technische Physik, Germany
Henning Weier
Quantum Space Systems GmbH, Hausham, Germany
Consortium coordinator (PI): Rinaldo Trotta
Coordination of technical activities: Francesco Basso Basset
Sapienza University of Rome, Physics Department, Italy
EVENTS
The project started on 01/06/2022 and the on-line kick-off meeting took place on 04/07/2022
The in-person-kick-off meeting took place on 26/10/2022 at the Department of Physics of Sapienza University of Rome.
PUBLICATIONS
1)T. Seidelmann, C. Schimpf, T. K. Bracht, M. Cosacchi, A. Vagov, A. Rastelli, D. E. Reiter, and V. M. Axt
Two-Photon Excitation Sets Limit to Entangled Photon Pair Generation from Quantum Emitters
Phys. Rev. Lett. 129, 193604 (2022)
2)A. Laneve, M. B. Rota, F. Basso Basset, N. P. Fiorente, T. M. Krieger, S. F. Covre da Silva, Q. Buchinger, S.
Stroj, S. Hoefling, T. Huber-Loyola, A. Rastelli, R. Trotta, P. Mataloni
Experimental Multi-state Quantum Discrimination in the Frequency Domain with Quantum Dot Light
3) F. Basso Basset, M. B. Rota , M. Beccaceci, T. M. Krieger, Q. Buchinger, J. Neuwirth, H. Huet, S. Stroj, S. F. Covre da Silva, C. Schimpf, S. Hoefling, T. Huber-Loyola, A. Rastelli, and R. Trotta
Signatures of the Optical Stark Effect on Entangled Photon Pairs from Resonantly-Pumped Quantum Dots
Phys. Rev. Lett. 131, 166901 (2023)
4)Q. Buchinger, S. Betzold, S. Höfling & T. Huber-Loyola
Optical properties of circular Bragg gratings with labyrinth geometry to enable electrical contacts
Appl. Phys. Lett.122, 111110 (2023)
5)B. U. Lehner, T. Seidelmann, G. Undeutsch, C. Schimpf, S. Manna, M. Gawełczyk, S. F. Covre da Silva, X. Yuan, S. Stroj, D. E. Reiter, V. M. Axt, and A. Rastelli
Beyond the Four-Level Model: Dark and Hot States in Quantum Dots Degrade Photonic Entanglement
6)T. Seidelmann, T. K. Bracht, B. U. Lehner, C. Schimpf, M. Cosacchi, M. Cygorek, A. Vagov, A. Rastelli, D. E. Reiter, and V. M. Axt
Two-photon excitation with finite pulses unlocks pure dephasing-induced degradation of entangled photons emitted by quantum dots
Phys. Rev. B 107, 235304 (2023)
7)X. Yuan, S. F. Covre da Silva, D. Csontosová, H. Huang, C. Schimpf, M. Reindl, J. Lu, Z. Ni, A. Rastelli, and P. Klenovský
GaAs quantum dots under quasiuniaxial stress: Experiment and theory
Phys. Rev. B 107, 235412 (2023)
8)C. Schimpf, F. Basso Basset, M. Aigner, W. Attenender, L. Ginés, G. Undeutsch, M. Reindl, D. Huber, D. Gangloff, E. A. Chekhovich, C. Schneider, S. Höfling, A. Predojević, R. Trotta, and A. Rastelli
Hyperfine interaction limits polarization entanglement of photons from semiconductor quantum dots
Phys. Rev. B 108, L081405 (2023)
9)M. Lasota, O. Kovalenko and V. C. Usenko
Robustness of entanglement-based discrete- and continuous-variable quantum key distribution against channel noise
10) T. M. Krieger, C. Weidinger, T. Oberleitner, G. Undeutsch, M. B. Rota, N. Tajik, M. Aigner, Q. Buchinger, C. Schimpf, A. J. Garcia Jr., S. F. Covre da Silva, S. Höfling, T. Huber-Loyola, R. Trotta, A. Rastelli
Postfabrication Tuning of Circular Bragg Resonators for Enhanced Emitter-Cavity Coupling
ACS Photonics, 11, 2, 596 (2024)
11)G. Peniakov, Q. Buchinger, M. Helal, S. Betzold, Y. Reum, M. B. Rota, G. Ronco, M. Beccaceci, T. M. Krieger, S. F. Covre da Silva
Polarized and Unpolarized Emission from a Single Emitter in a Bullseye Resonator
Laser Photonics Rev 18, 2300832 (2024)
12)M. B. Rota, T. M. Krieger, Q. Buchinger, M. Beccaceci, J. Neuwirth, H. Huet, N. Horová, G. Lovicu, G. Ronco, S. F. Covre da Silva, G. Pettinari, M. Moczała-Dusanowska, C. Kohlberger, S. Manna, S. Stroj, J. Freund, X. Yuan, C. Schneider, M. Ježek, S. Höfling, F. Basso Basset, T. Huber-Loyola, A. Rastelli & R. Trotta
A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot
13)A. Laneve, G. Ronco, M. Beccaceci, P. Barigelli, F. Salusti, N. Claro-Rodriguez, G. De Pascalis, A. Suprano, L. Chiaudano, E. Schöll, L. Hanschke, T. M. Krieger, Q. Buchinger, S. F. Covre da Silva, J. Neuwirth, S. Stroj, S. Höfling, T. Huber-Loyola, M. A. Usuga Castaneda, G. Carvacho, N. Spagnolo, M. B. Rota, F. Basso Basset, A. Rastelli, F. Sciarrino, K. Jöns, R. Trotta
Quantum teleportation with dissimilar quantum dots over a hybrid quantum network
14)G. Undeutsch, M. Aigner, A. J Garcia Jr., J. Reindl, M. Peter, S. Mader, C. Weidinger, S. F. Covre da Silva, S. Manna, E. Schöll, A. Rastelli
Electric-Field Control of Photon Indistinguishability in Cascaded Decays in Quantum Dots
15)A. Laneve, M. B. Rota, F. Basso Basset, M. Beccaceci, V. Villari, T. Oberleitner, Y. Reum, T. M. Krieger, Q. Buchinger, R. Prasad, S. F. Covre da Silva, A. Pfenning, S. Stroj, S. Höfling, A. Rastelli, T. Huber-Loyola & R.Trotta
Wavevector-resolved polarization entanglement from radiative cascades
16)Quirin Buchinger, Constantin Krause, Aileen Zhang, Giora Peniakov, Mohamed Helal, Yorick Reum, Andreas Theo Pfenning, Sven Höfling & Tobias Huber-Loyola
Deterministic quantum dot cavity placement using hyperspectral imaging with high spatial accuracy and precision
Nano Convergence 12, 36 (2025)
17)V. C. Usenko
Shared-reference-frame-independent continuous-variable quantum key distribution
Optics Express, 33, 22643 (2025)
18)J. Freund, F. Basso Basset, T. M. Krieger, A. Laneve, M. Beccaceci, M. B. Rota, Q. Buchinger, S. F. Covre da Silva, S.Stroj, S. Höfling, T.Huber-Loyola, R. Kueng, A. Rastelli, R. Trotta, O. Gühne
Entanglement and purity can help to detect systematic experimental errors
