Seminar "Toward feasible long-distance quantum communication systems" Nicolò Lo Piparo

Quantum Systems Unit (Busch U) would like to invite you a seminar by Dr. Nicolò Lo Piparo

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Date: Thursday, 23rd February
Time: 13:00-14:00
Venue: D015, Level D, Lab1
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Speaker:
Dr. Nicolò Lo Piparo, National Institute of Informatics

Title & Abstract:
Toward feasible long-distance quantum communication systems

Memory-assisted measurement-device-independent quantum key distribution (MA-MDI-QKD) aims to improve the rate-versus-distance behavior of QKD systems by using existing technologies. While quantum repeater systems, as the ultimate solution to long-distance quantum communications, are still too challenging to be implemented, MA-MDI-QKD presents a feasible middle step toward the realization of long-distance QKD. In this talk, I summarize the progress with MA-MDI-QKD  by considering some of the MA-MDI-QKD schemes proposed so far. In particular I will focus on two types of schemes. One relies on single-photon sources (SPSs) and ensemble-based memories, and the other uses nitrogen-vacancy (NV) centers in diamond embedded into cavities. As the main figure of merit, I calculate the secret key rates for both type of schemes and compare them with conventional no-memory schemes. I show that, by using the state-of-the-art devices, MA-MDI-QKD can potentially beat existing QKD schemes in reach and rate.

We look forward to seeing many of you at this seminar.

Best regards,
Quantum Systems Unit