Journal
PHYSICAL REVIEW A
Volume 81, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.81.053619
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Funding
- NSF of China [10640420151, 10974112]
- NKBRSF of China [2006CB921206, 2006AA06Z104]
- National Fundamental Research Program of China [2006CB605105, 2006CB921404]
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We propose a pump scheme for quantum circulations, including countercirculations for superposition states, of a spinor Bose-Einstein condensate. Our scheme is efficient and can be implemented within current experimental technologies and setups. It remains valid for nonclassical atomic states, such as pseudo-spin-squeezed states and maximally entangled N-particle Greenberger-Horne-Zeilinger (vertical bar N, 0 > + vertical bar 0, N >) states. Moreover, it is capable of transforming several enhanced sensing protocols relying on reduced fluctuations from quantum correlation and entanglement of atomic internal states to enhanced measurement of spatial interference and rotation.
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