N identical particles and one particle to entangle them all

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21 Citations (Scopus)


In quantum information, W states are a central class of multipartite entangled states because of their robustness against noise and their use in many quantum processes. Their generation, however, remains a demanding task whose difficulty increases with the number of particles. We report a simple scalable conceptual scheme where a single particle in an ancilla mode works as an entanglement catalyst of the W state for other N separated identical particles. A crucial aspect of the scheme, which exploits basically spatial indistinguishability, is its universality, being applicable without essential changes to both bosons and fermions. Our proposal represents a paradigm within the experimental preparation of many-particle entanglement based on quantum indistinguishability.
Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalPhysical Review A
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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