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Generation of a macroscopic singlet state in an atomic ensemble

descriptionPublicationkeyboard_double_arrow_right Article , Conference object , Other literature type 01 Jan 2011Publisher:OSAJournal:Research in Optical SciencesFunded by:EC | GEDENTQOPT

Authors: N. Behbood; M. Napolitano; G. Colangelo; B. Dubost; S. Palacios Álvarez; R. Sewell; G. Tóth; +1 Authors

doi: 10.1364/qim.2012.qm1b.2 , 10.1109/cleoe.2011.5942915 , 10.1364/qels.2012.qf3e.3 , 10.1364/cleo_at.2011.jthb8

Generation of a macroscopic singlet state in an atomic ensemble

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Abstract

We report on an experiment underway for generating a singlet state in a cold atomic ensemble. The experiment is based on a recent proposal to generate these states by applying a quantum non-demolition (QND) measurement and feedback to an unpolarized ensemble [1]. Our criteria for generating the singlet state is the spin squeezing parameter equation where F i are the components of the collective angular momentum, N is the number of atoms and f is the spin of a single particle. Any state with ξ s < 1 is an entangled state [2]. Our procedure, described bellow, will lead to a highly entangled state with ξ s ≪ 1 starting from a non-entangled state with ξ ∼ 1.

Related Organizations

French National Centre for Scientific Research
France
University of Paris
France
Laboratory Materials and Quantum Phenomena
France
Institute of Photonic Sciences
Spain
University of the Basque Country
Spain

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