Abstract
In quantum information, 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 state for other 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.
- Received 20 April 2017
DOI:https://doi.org/10.1103/PhysRevA.96.022319
©2017 American Physical Society