Abstract
Continuous quantum nondemolition monitoring of a collective atomic spin with an off-resonant laser beam has been performed. Squeezed atomic spin states have thereby been produced with spin noise reduction to below the standard quantum limit expected for a coherent spin state.
- Received 21 December 1999
DOI:https://doi.org/10.1103/PhysRevLett.85.1594
©2000 American Physical Society