Abstract
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 statistical significance using a generalized spin-squeezing inequality. The degree of squeezing implies at least 50% of the atoms have formed singlets.
- Received 2 April 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.093601
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© 2014 Published by American Physical Society