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Quantum correlations and entanglement in identical-particle systems have beena puzzling question which has attracted vast interest and widely differentapproaches. A novel approach is introduced by Kraus \emph{et al.}, [Phys. Rev.A \textbf{79}, 012306 (2009)] based on pairing correlations in fermionicsystems and the use of witness formalism to detect pairing. In thiscontribution, this approach has been extended to bosonic systems andseparability bounds based on pairing correlations for fermions and bosons havebeen obtained. A two-particle annihilation operator is used for constructing atwo-particle observable as a candidate witness. Two different types ofseparability definition is introduced for bosonic systems and the separabilitybounds associated with each type are discussed.

Pairing Correlations and Separability Conditions in Identical Particle Systems