期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.093601
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资金
- Spanish MINECO [FIS2011-23520, FIS2012-36673-C03-03]
- EU
- Basque Government [IT4720-10]
- OTKA [K83858]
- ICREA Funding Source: Custom
We report the generation of a macroscopic singlet state in a cold atomic sample via quantum nondemolition measurement-induced spin squeezing. We observe 3 dB of spin squeezing and detect entanglement with 5 sigma statistical significance using a generalized spin-squeezing inequality. The degree of squeezing implies at least 50% of the atoms have formed singlets.
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