On-chip generation of high-order single-photon W-states

    Authors

    M. Grafe; R. Heilmann; A. Perez-Leija; R. Keil; F. Dreisow; M. Heinrich; H. Moya-Cessa; S. Nolte; D. N. Christodoulides;A. Szameit

    Comments

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    Abbreviated Journal Title

    Nat. Photonics

    Keywords

    RANDOM NUMBER GENERATOR; MULTIPARTICLE ENTANGLEMENT; QUANTUM CIRCUITS; TELEPORTATION; LASERS; Optics; Physics, Applied

    Abstract

    Quantum superposition is the quantum-mechanical property of a particle whereby it inhabits several of its possible quantum states simultaneously. Ideally, this permissible coexistence of quantum states, as defined on any degree of freedom, whether spin, frequency or spatial, can be used to fully exploit the information capacity of the associated physical system. In quantum optics, single photons are the quanta of light, and their coherence properties allow them to establish entangled superpositions between a large number of channels, making them favourable for realizations of quantum information processing schemes. In particular, single-photon W-states (that is, states exhibiting a uniform distribution of the photons across multiple modes) represent a class of multipartite maximally-entangled quantum states that are highly robust to dissipation. Here, we report on the generation and verification of single-photon W-states involving up to 16 spatial modes, and exploit their underlying multi-mode superposition for the on-chip generation of genuine random numbers.

    Journal Title

    Nature Photonics

    Volume

    8

    Issue/Number

    10

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    791

    Last Page

    795

    WOS Identifier

    WOS:000343145200013

    ISSN

    1749-4885

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