期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep44764
关键词
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资金
- Ministry of Science and Technology of the People's Republic of China [2015CB856703]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB23030100]
- National Natural Science Foundation of China(NSFC) [11375200, 11635009]
Uncertainty relation lies at the heart of quantum mechanics, characterizing the incompatibility of non-commuting observables in the preparation of quantum states. An important question is how to improve the lower bound of uncertainty relation. Here we present a variance-based sum uncertainty relation for N incompatible observables stronger than the simple generalization of an existing uncertainty relation for two observables. Further comparisons of our uncertainty relation with other related ones for spin-1/2 and spin-1 particles indicate that the obtained uncertainty relation gives a better lower bound.
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