The Budapest Quantum Optics Group

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Relation between entanglement and squeezing in spin ensembles

Zoltán Kurucz


Time: Tue Jan 22 13:00:00 2013
Location: Building 1, Room 114, Auditorium

Spin squeezing is a procedure in which the uncertainty in one of the transverse components of the total angular momentum of a spin ensemble is reduced below the standard quantum limit. For ensembles of spin-1/2 particles, this procedure necessarily involves entanglement among the atoms. For larger spins, however, the degree of squeezing does not give a measure of interatomic entanglement, because squeezing may originate from intra-atomic correlations. In order to quantify how much squeezing is related to entanglement, the challenge is to measure higher order moments of the single-particle angular momentum operators.