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.

Bellomo, B., Lo Franco, R., Compagno, G. (2017). N identical particles and one particle to entangle them all. PHYSICAL REVIEW A, 96(2), 1-6 [10.1103/PhysRevA.96.022319].

N identical particles and one particle to entangle them all

LO FRANCO, Rosario;COMPAGNO, Giuseppe
2017-01-01

Abstract

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.
2017
Bellomo, B., Lo Franco, R., Compagno, G. (2017). N identical particles and one particle to entangle them all. PHYSICAL REVIEW A, 96(2), 1-6 [10.1103/PhysRevA.96.022319].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/240801
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