期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.160405
关键词
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资金
- Swedish Research Council (VR)
- Spanish MCI [FIS2008-05596]
- Junta de Andalucia Excellence [P06-FQM-02243]
We present an experimental state-independent violation of an inequality for noncontextual theories on single particles. We show that 20 different single-photon states violate an inequality which involves correlations between results of sequential compatible measurements by at least 419 standard deviations. Our results show that, for any physical system, even for a single system, and independent of its state, there is a universal set of tests whose results do not admit a noncontextual interpretation. This sheds new light on the role of quantum mechanics in quantum information processing.
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