High-dimensional one-way quantum processing implemented on d-level cluster states

Alfonso Carmelo Cino, Stefania Sciara, Lucia Caspani, Raman Kashyap, Michael Kues, Sébastien Loranger, Christian Reimer, Yanbing Zhang, Luis Romero Cortés, Piotr Roztocki, Stefania Sciara, Bennet Fischer, Mehedi Islam, Roberto Morandotti, José Azaña, William J. Munro, David J. Moss, Brent E. Little, Sai T. Chu

Risultato della ricerca: Articlepeer review

47 Citazioni (Scopus)

Abstract

Taking advantage of quantum mechanics for executing computational tasks faster than classical computers or performing measurements with precision exceeding the classical limit requires the generation of specific large and complex quantum states. In this context, cluster states are particularly interesting because they can enable the realization of universal quantum computers by means of a ‘one-way’ scheme, where processing is performed through measurements. The generation of cluster states based on sub-systems that have more than two dimensions, d-level cluster states, provides increased quantum resources while keeping the number of parties constant, and also enables novel algorithms8. Here, we experimentally realize, characterize and test the noise sensitivity of three-level, four-partite cluster states formed by two photons in the time and frequency domain, confirming genuine multi-partite entanglement with higher noise robustness compared to conventional two-level cluster states. We perform proof-of-concept high-dimensional one-way quantum operations, where the cluster states are transformed into orthogonal, maximally entangled d-level two-partite states by means of projection measurements. Our scalable approach is based on integrated photonic chips and optical fibre communication components, thus achieving new and deterministic functionalities.
Lingua originaleEnglish
Numero di pagine9
RivistaNature Physics
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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