Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.093601
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Funding
- Spanish MINECO [FIS2011-23520, FIS2012-36673-C03-03]
- EU
- Basque Government [IT4720-10]
- OTKA [K83858]
- ICREA Funding Source: Custom
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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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