Measurement of identical particle entanglement and the influence of antisymmetrization

J. H. Becher, E. Sindici, R. Klemt, S. Jochim, A. J. Daley, P. M. Preiss

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
12 Downloads (Pure)


We explore the relationship between symmetrization and entanglement through measurements on few-particle systems in a multiwell potential. In particular, considering two or three trapped atoms, we measure and distinguish correlations arising from two different physical origins: antisymmetrization of the fermionic wave function and interaction between particles. We quantify this through the entanglement negativity of states, and the introduction of an antisymmetric negativity, which allows us to understand the role that symmetrization plays in the measured entanglement properties. We apply this concept both to pure theoretical states and to experimentally reconstructed density matrices of two or three mobile particles in an array of optical tweezers.

Original languageEnglish
Article number180402
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 30 Oct 2020


  • entanglement detection
  • entanglement measures
  • Fermi gases


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