Witnessing pairing correlations in identical-particle systems

Date

2021-12-01

Author

Aksak, Cagan
Turgut, Sadi

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Quantum correlations and entanglement in identical-particle systems have been a puz-zling question which has attracted vast interest and widely different approaches. Witness formalism developed first for entanglement measurement can be adopted to other kind of correlations. An approach is introduced by Kraus et al., [Phys. Rev. A 79, 012306 (2009)] based on pairing correlations in fermionic systems and the use of witness formalism to detect pairing. In this contribution, a two-particle-annihilation operator is used for constructing a two-particle observable as a candidate witness for pairing correlations of both fermionic and bosonic systems. The corresponding separability bounds are also obtained. Two different types of separability definition are introduced for bosonic systems and the separability bounds associated with each type are discussed.

Subject Keywords

Entanglement, Pairing, Quantum correlations

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121293042&origin=inward
https://hdl.handle.net/11511/95129

Journal

Quantum Information and Computation

DOI

https://doi.org/10.26421/qic21.15-16-4

Collections

Department of Physics, Article

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Citation Formats

C. Aksak and S. Turgut, “Witnessing pairing correlations in identical-particle systems,” Quantum Information and Computation, vol. 21, no. 15-16, pp. 1307–1319, 2021, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121293042&origin=inward.