Structural change in multipartite entanglement sharing: A random matrix approach

G. Gennaro, Steve Campbell, Mauro Paternostro, Massimo Palma

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We study the typical entanglement properties of a system comprising two independent qubit environments interacting via a shuttling ancilla. The initial preparation of the environments is modeled using random matrix techniques. The entanglement measure used in our study is then averaged over many histories of randomly prepared environmental states. Under a Heisenberg interaction model, the average entanglement between the ancilla and one of the environments remains constant, regardless of the preparation of the latter and the details of the interaction. We also show that, upon suitable kinematic and dynamical changes in the ancillaenvironment subsystems, the entanglement-sharing structure undergoes abrupt modifications associated with a change in the multipartite entanglement class of the overall system's state. These results are invariant with respect to the randomized initial state of the environments.
Original languageEnglish
Article number062315
Pages (from-to)062315-062325
Number of pages11
JournalPhysical Review A
Issue number6
Publication statusPublished - 08 Dec 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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