Generalized measurements on qubits in quantum randomness certification and expansion

Piotr Andrzej Mironowicz; Marcus Gruenfeld; Mohamed Bourennane

doi:10.1103/physrevapplied.22.044041

Generalized measurements on qubits in quantum randomness certification and expansion

Abstrakt

Quantum mechanics has greatly impacted our understanding of microscopic nature. One of the key concepts of this theory is generalized measurements, which have proven useful in various quantum information processing tasks. However, despite their significance, they have not yet been shown empirically to provide an advantage in quantum randomness certification and expansion protocols. This investigation explores scenarios where generalized measurements can yield more than 1 bit of certified randomness with a single-qubit system measurement on untrusted devices and against a quantum adversary. We compare the robustness of several protocols to exhibit the advantage of exploiting generalized measurements. In our analysis of experimental data, we were able to obtain 1.21 bits of min-entropy from a measurement taken on one qubit of an entangled state. We also obtained 1.07 bits of min-entropy from an experiment with quantum state preparation and generalized measurement on a single qubit. We also provide finite data analysis for a protocol using generalized measurements and the Entropy Accumulation Theorem. Our exploration demonstrates the potential of generalized measurements to improve the certification of quantum sources of randomness and enhance the security of quantum cryptographic protocols and other areas of quantum information.

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Autorzy (3)

Piotr Andrzej Mironowicz (dawniej: Piotr Mironowicz) dr inż.
- Wydział Elektroniki, Telekomunikacji i Informatyki
- Politechnika Gdańska
Marcus Gruenfeld
Mohamed Bourennane

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Kategoria:

Publikacja w czasopiśmie

Typ:

artykuły w czasopismach

Opublikowano w:

Physical Review Applied nr 22,
ISSN: 2331-7019

Język:

angielski

Rok wydania:

2024

Opis bibliograficzny:

Mironowicz P., Gruenfeld M., Bourennane M.: Generalized measurements on qubits in quantum randomness certification and expansion// Physical Review Applied -,iss. 22 (2024), s.044041-

DOI: