期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.250403
关键词
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资金
- National Research Foundation of Singapore
- Ministry of Education of Singapore, MINECO [FIS2017-89609-P]
- FEDER funds
- Conserjeria de Conocimiento, Investigacion y Universidad, Junta de Andalucia
- European Regional Development Fund (ERDF) [SOMM17/6105/UGR]
- Knut and Alice Wallenberg Foundation
- NUS Young Investigator Grant [R-266-000-111-133]
- NRF Fellowship [NRF-NRFF2018-01, R-263-000-D02-281]
Characterizing unknown quantum states and measurements is a fundamental problem in quantum information processing. In this Letter, we provide a novel scheme to self-test local quantum systems using noncontextuality inequalities. Our work leverages the graph-theoretic framework for contextuality introduced by Cabello, Severini, and Winter, combined with tools from mathematical optimization that guarantee the unicity of optimal solutions. As an application, we show that the celebrated Klyachlco-Can-Binicioglu-Shumovsky inequality and its generalization to contextuality scenarios with odd n-cycle compatibility relations admit robust self-testing.
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