Fionnuala Curran: Maximal intrinsic randomness of a quantum state | PYSQT
Автор: PYSQT
Загружено: 2024-01-08
Просмотров: 291
Seminar by Fionnuala Curran, organized by the PYSQT (PhDs and Young Scientists Quantum Technologies) network on the 28-11-2023.
Maximal intrinsic randomness of a quantum state -
One of the most counterintuitive aspects of quantum theory is its claim that there is intrinsic randomness in the physical world. Arising from the phenomenon of superposition, this intrinsic or private randomness is inaccessible to any eavesdropper, a fact that is exploited in the design of quantum random number generators. We investigate how much intrinsic
randomness can be extracted from a characterised quantum state using projective measurements. We consider two different quantifiers of randomness: the conditional min-entropy, which is related to the probability that the most powerful quantum eavesdropper can guess the measurement outcomes, and the conditional von Neumann entropy. We
find analytic bounds for both of these quantities and necessary and sufficient conditions for a measurement to achieve the bounds. Interesting, while one always can saturate both bounds by measuring in a basis unbiased to that of the quantum state, the conditions for maximising each of the entropies are, in general, inequivalent.
https://doi.org/10.48550/arXiv.2307.1...
Доступные форматы для скачивания:
Скачать видео mp4
-
Информация по загрузке:
