期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.190401
关键词
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资金
- EU
- Spanish project QUITEMAD [MTM2011-26912]
- Spanish project MINECO: ICMAT Severo Ochoa project [SEV-2011-0087]
- Juan de la Cierva'' program
In this Letter we show that quantum nonlocality can be superactivated. That is, one can obtain violations of Bell inequalities by tensorizing a local state with itself. In the second part of this work we study how large these violations can be. In particular, we show the existence of quantum states with very low Bell violation but such that five copies of them give very large violations. In fact, this gap can be made arbitrarily large by increasing the dimension of the states.
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