Y. Hasegawa, R. Loidl, G. Badurek, S. Filipp, J. Klepp, H. Rauch
{"title":"单中子自旋路径纠缠诱导的量子情境性","authors":"Y. Hasegawa, R. Loidl, G. Badurek, S. Filipp, J. Klepp, H. Rauch","doi":"10.1556/APH.26.2006.1-2.18","DOIUrl":null,"url":null,"abstract":"Since Einstein, Podolsky and Rosen suggested in the thirties and nowadays known as an EPR-paradox, non-local correlations between sufficiently separated subsystems have been extensively discussed. From a theoretical point of view, such a non-locality can be interpreted as a consequence of the correlation between commuting observables. A more general concept, i.e. contextuality, compared to non-locality can be introduced to describe striking phenomena predicted by quantum theory. As the first example, a neutron interferometer experiment is presented, where the spin and the path degrees of freedom are used to exhibit the clear violation of a Bell-like inequality. Other aspects of the quantum contextuality is reported, e.g. a flavor of Kochen-Specker-like contradiction in neutron optical experiments. In addition, the quantum state tomography of the Bell states, which are used in the experiments, is shown.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Quantum contextuality induced by spin-path entanglement in single-neutrons\",\"authors\":\"Y. Hasegawa, R. Loidl, G. Badurek, S. Filipp, J. Klepp, H. Rauch\",\"doi\":\"10.1556/APH.26.2006.1-2.18\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Since Einstein, Podolsky and Rosen suggested in the thirties and nowadays known as an EPR-paradox, non-local correlations between sufficiently separated subsystems have been extensively discussed. From a theoretical point of view, such a non-locality can be interpreted as a consequence of the correlation between commuting observables. A more general concept, i.e. contextuality, compared to non-locality can be introduced to describe striking phenomena predicted by quantum theory. As the first example, a neutron interferometer experiment is presented, where the spin and the path degrees of freedom are used to exhibit the clear violation of a Bell-like inequality. Other aspects of the quantum contextuality is reported, e.g. a flavor of Kochen-Specker-like contradiction in neutron optical experiments. In addition, the quantum state tomography of the Bell states, which are used in the experiments, is shown.\",\"PeriodicalId\":150867,\"journal\":{\"name\":\"Acta Physica Hungarica B) Quantum Electronics\",\"volume\":\"3 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-12-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Physica Hungarica B) Quantum Electronics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1556/APH.26.2006.1-2.18\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Physica Hungarica B) Quantum Electronics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1556/APH.26.2006.1-2.18","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Quantum contextuality induced by spin-path entanglement in single-neutrons
Since Einstein, Podolsky and Rosen suggested in the thirties and nowadays known as an EPR-paradox, non-local correlations between sufficiently separated subsystems have been extensively discussed. From a theoretical point of view, such a non-locality can be interpreted as a consequence of the correlation between commuting observables. A more general concept, i.e. contextuality, compared to non-locality can be introduced to describe striking phenomena predicted by quantum theory. As the first example, a neutron interferometer experiment is presented, where the spin and the path degrees of freedom are used to exhibit the clear violation of a Bell-like inequality. Other aspects of the quantum contextuality is reported, e.g. a flavor of Kochen-Specker-like contradiction in neutron optical experiments. In addition, the quantum state tomography of the Bell states, which are used in the experiments, is shown.