Details
Originalsprache | Englisch |
---|---|
Aufsatznummer | 200202 |
Seitenumfang | 6 |
Fachzeitschrift | Physical review letters |
Jahrgang | 134 |
Ausgabenummer | 20 |
Publikationsstatus | Veröffentlicht - 22 Mai 2025 |
Abstract
We present a derivation and experimental implementation of a dimension-dependent contextuality inequality to certify both the quantumness and dimensionality of a given system. Existing methods for certification of the dimension of a quantum system can be cheated by using larger classical systems, creating a potential loophole in these benchmarks, or can in practice only be evaluated assuming pure quantum states. Our approach uses contextuality inequalities that cannot be violated by classical systems thus closing the previous loopholes. We validate this framework experimentally with photons, observing violations of a CHSH-based contextuality inequality and surpassing the qutrit bound of the CGLMP4-based contextuality inequality. These show that contextuality can be used for noise-robust tests of the number of qubits.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Physical review letters, Jahrgang 134, Nr. 20, 200202, 22.05.2025.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Experimental Implementation of Dimension-Dependent Contextuality Inequality
AU - Håkansson, Emil
AU - Piveteau, Amelie
AU - Seguinard, Alban
AU - Muhammad, Sadiq
AU - Bourennane, Mohamed
AU - Gühne, Otfried
AU - Plávala, Martin
N1 - Publisher Copyright: © 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
PY - 2025/5/22
Y1 - 2025/5/22
N2 - We present a derivation and experimental implementation of a dimension-dependent contextuality inequality to certify both the quantumness and dimensionality of a given system. Existing methods for certification of the dimension of a quantum system can be cheated by using larger classical systems, creating a potential loophole in these benchmarks, or can in practice only be evaluated assuming pure quantum states. Our approach uses contextuality inequalities that cannot be violated by classical systems thus closing the previous loopholes. We validate this framework experimentally with photons, observing violations of a CHSH-based contextuality inequality and surpassing the qutrit bound of the CGLMP4-based contextuality inequality. These show that contextuality can be used for noise-robust tests of the number of qubits.
AB - We present a derivation and experimental implementation of a dimension-dependent contextuality inequality to certify both the quantumness and dimensionality of a given system. Existing methods for certification of the dimension of a quantum system can be cheated by using larger classical systems, creating a potential loophole in these benchmarks, or can in practice only be evaluated assuming pure quantum states. Our approach uses contextuality inequalities that cannot be violated by classical systems thus closing the previous loopholes. We validate this framework experimentally with photons, observing violations of a CHSH-based contextuality inequality and surpassing the qutrit bound of the CGLMP4-based contextuality inequality. These show that contextuality can be used for noise-robust tests of the number of qubits.
UR - http://www.scopus.com/inward/record.url?scp=105005830291&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.134.200202
DO - 10.1103/PhysRevLett.134.200202
M3 - Article
AN - SCOPUS:105005830291
VL - 134
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 20
M1 - 200202
ER -