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

Abstract

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.

Citations

0

CrossRef
0

Web of Science
1

Scopus

Authors (3)

Piotr Andrzej Mironowicz (formerly: Piotr Mironowicz) dr inż.
- Faculty of Electronics, Telecommunications and Informatics
- Gdańsk University of Technology
Marcus Gruenfeld
Mohamed Bourennane

Cite as

Full text

full text is not available in portal

full content of the article see on external site open in new tab

Keywords

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

Physical Review Applied no. 22,
ISSN: 2331-7019

Language:

English

Publication year:

2024

Bibliographic description:

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: