Experimental non-classicality of an indivisible quantum system
| Autor: | Lapkiewicz, Radek, Li, Peizhe, Schaeff, Christoph, Langford, Nathan K., Ramelow, Sven, Wiesniak, Marcin, Zeilinger, Anton |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Nature 474, 490 (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/nature10119 |
| Popis: | Quantum theory demands that, in contrast to classical physics, not all properties can be simultaneously well defined. The Heisenberg Uncertainty Principle is a manifestation of this fact. Another important corollary arises that there can be no joint probability distribution describing the outcomes of all possible measurements, allowing a quantum system to be classically understood. We provide the first experimental evidence that even for a single three-state system, a qutrit, no such classical model can exist that correctly describes the results of a simple set of pairwise compatible measurements. Not only is a single qutrit the simplest system in which such a contradiction is possible, but, even more importantly, the contradiction cannot result from entanglement, because such a system is indivisible, and it does not even allow the concept of entanglement between subsystems. Comment: 11 pages, 4 figures, 2 tables |
| Databáze: | arXiv |
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