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Abstract: This article reviews recent hybrid approaches to optical quantum informationprocessing, in which both discrete and continuous degrees of freedom areexploited. There are well-known limitations to optical single-photon-basedqubit and multi-photon-based qumode implementations of quantum communicationand quantum computation, when the toolbox is restricted to the most practicalset of linear operations and resources such as linear optics and Gaussianoperations and states. The recent hybrid approaches aim at pushing thefeasibility, the efficiencies, and the fidelities of the linear schemes to thelimits, potentially adding weak or measurement-induced nonlinearities to thetoolbox.

Author: Peter van Loock

Source: https://arxiv.org/

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