Naslov
Quantum communication with entangled photon pairs

Autori
Peranić, Matej ; Lončarić, Martin ; Radman, Anton ; Stipčević, Mario

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Knjiga sažetaka / Barišić, Dajana - Zagreb, 2021, 150-151

ISBN
978-953-6076-90-1

Skup
5. Simpozij studenata doktorskih studija PMF-a = 5th Faculty of Science PhD Student Symposium

Mjesto i datum
Zagreb, Hrvatska, 24.04.2021. - 25.04.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
photon, quantum entanglement, quantum communications

Sažetak
Today, perhaps more than ever before, the security of information and communication is increasingly important. The cryptographic protocols used in classical cryptography are based on mathematical algorithms and can be breached. On the other hand, the laws of quantum physics enable quantum key distribution (QKD) and absolute security of communication based on the fundamental laws of nature can be achieved [1, 2]. Anyone who would eavesdrop on QKD-based communication must perform a measurement and this implies an impact on the system that can be detected by the sender and receiver. In this lecture, I will present an experimental setup for generating a quantum key for communication between two users consisting of a source of polarization entangled photon pairs, an infrastructure for passive analysis of photon polarization states and a detector. Using this setup we measured violation of the Bell's inequality of 114 standard deviations from the classical boundary, which confirms the non-local behavior of the entangled photon pairs [3]. Furthermore, the long-term stability of security communication parameters was achieved, which confirms the security of the communication link. Apart from local quantum communication networks, I will show how this source can also be used to create hybrid connections that can be realized in combination with both optical fibers and free space.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA