BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:A.A. Kalachev DTSTART:20240906T134000Z DTEND:20240906T141000Z DTSTAMP:20260423T024623Z UID:QOART/27 DESCRIPTION:Title: Q uantum hashing via single-photon states\nby A.A. Kalachev as part of Q uantum Optics and Related Topics\n\n\nAbstract\nA quantum hashing is a pro mising generalization of the cryptographic hashing concept on the quantum domain. In this case\, the hash function encodes a classical input state i nto a quantum state so that to optimize the trade-off between one-way prop erty and collision resistance. In the present work\, we develop a quantum hashing technique wherein a quantum hash is constructed as a sequence of s ingle-photon qubits [1] or qudits [2]. A proof-of-principle implementation of the quantum hashing protocol using orbital-angular momentum encoding o f single photons demonstrates good agreement with theoretical predictions. In particular\, it shows that the number of qudits decreases with increas e of their dimension for an optimal ratio between collision probability an d decoding probability of the hash [2]. The prospects of increasing dimens ion of information carriers\, which makes quantum hashing with single phot ons more efficient\, are discussed [3].\n\n[1] D. A. Turaykhanov\, D. O. A kat'ev\, A. V. Vasiliev\, F. M. Ablayev\, and A. A. Kalachev. Quantum hash ing via single-photon states with orbital angular momentum. Physical Revie w A\, 104\, 052606 (2021)\n\n[2] D.O. Akat’ev\, A.V. Vasiliev\, N.M. Sha feev\, F.M. Ablayev\, A.A. Kalachev. Multiqudit quantum hashing and its im plementation based on orbital angular momentum encoding. Laser Physics Let ters 19\, 125205 (2022)\n\n[3] D. A. Turaykhanov\, N.M. Shafeev\, A. V. Va siliev\, F. M. Ablayev\, and A. A. Kalachev. Quantum hashing with orbital angular momentum and polarization encoding. (to be submitted)\n LOCATION:https://researchseminars.org/talk/QOART/27/ END:VEVENT END:VCALENDAR