Warsaw Quantum Computing Group

We invite you to attend (remote-only) Episode XXX of the Warsaw Quantum Computing Group meetings!

5.07, 18:00 CET

Adam Widomski

„Generation and detection of QKD symbols encoded in time and frequency"

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Abstract from Adam:

Today’s world is driven by huge amounts of critically important information, such as financial, industrial, medical, and military data. Secure exchange of data is endangered by mathematical progress, increment in computational resources, and developments in quantum computing. Quantum Key Distribution could provide a counter-method for all the mentioned threats as it is based on fundamental laws of quantum physics instead of man-made algorithms. In this presentation, I will discuss the progress towards the experimental realization of QKD systems, especially a multidimensional QKD protocol with time-frequency encoding. I will report on the generation and detection of spectral and temporal symbols by means of fast electro-optic amplitude modulation combined with electrical signal shaping and dispersive Fourier transformation. The influence of the RF bandwidth and timing jitter on the dimensionality of the protocol will be described. Finally, I will discuss the potential of our approach, possibilities of implementation within fibre optic network infrastructure, and opportunities for photonic integration.


Adam Widomski is a PhD student at the University of Warsaw. He graduated from the Faculty of Physics of the University of Warsaw with a Master’s degree in optics and an

engineer’s degree in Photonics from the Faculty of Physics of the Warsaw University of Technology. He gained his experience during his scientific internships at the Instituto Nazionale di Ricerca Metrologica (INRIM, Turin) and Oxford University. He participated in numerous conferences, including IDQuantique Winter School dedicated to quantum cryptography. Currently, he is an employee of the National Laboratory of Photonics and Quantum Technologies (NLPQT), where he is responsible for the construction of an interurban quantum key distribution (QKD) link in Poland. Since 2018 he has been an active member of The Student Association of Optics and Photonics of the University of Warsaw (KNOF-UW), where he has been the Vice President (2020-2021), and President since 2021. He is also the Vice President and Co-founder of the Candela Foundation.

This meeting is organized by the Quantum AI Foundation.

Strategic Partners: Snarto, Codec