Information theory and computation

  • Article |

    The concept of neuromorphic completeness and a system hierarchy for neuromorphic computing are presented, which could improve programming-language portability, hardware completeness and compilation feasibility of brain-inspired computing systems

    • Youhui Zhang
    • , Peng Qu
    •  & Luping Shi
  • Letter |

    Image reconstruction is reformulated using a data-driven, supervised machine learning framework that allows a mapping between sensor and image domains to emerge from even noisy and undersampled data, improving accuracy and reducing image artefacts.

    • Bo Zhu
    • , Jeremiah Z. Liu
    •  & Matthew S. Rosen
  • Review Article |

    The leading proposals for converting noise-resilient quantum devices from memories to processors are compared, paying attention to the relative resource demands of each.

    • Earl T. Campbell
    • , Barbara M. Terhal
    •  & Christophe Vuillot
  • Letter |

    Spoken-digit recognition using a nanoscale spintronic oscillator that mimics the behaviour of neurons demonstrates the potential of such oscillators for realizing large-scale neural networks in future hardware.

    • Jacob Torrejon
    • , Mathieu Riou
    •  & Julie Grollier
  • Review Article |

    Quantum technology enables new methods for generating of randomness with minimal assumptions, certified by the violation of a Bell inequality, which opens up new theoretical and experimental research directions and leads to new challenges.

    • Antonio Acín
    •  & Lluis Masanes
  • Letter |

    The splitting of zero-energy Majorana modes in a tunnel-coupled InAs nanowire with epitaxial aluminium is exponentially suppressed as the wire length is increased, resulting in protection of these modes; this result helps to establish the robust presence of Majorana modes and quantifies exponential protection in nanowire devices.

    • S. M. Albrecht
    • , A. P. Higginbotham
    •  & C. M. Marcus
  • Article |

    Quantum computing promises advantages over classical computing for certain problems; now ‘quantum contextuality’ — a generalization of the concept of quantum non-locality — is shown to be a critical resource that gives the most promising class of quantum computers their power.

    • Mark Howard
    • , Joel Wallman
    •  & Joseph Emerson
  • Letter |

    An exactly solvable information-theoretical model of communications with a fully quantum electromagnetic field yields explicit expressions for all point-to-point capacities—the maximum possible rates of data transmission—of noisy quantum channels, with implications for quantum key distribution and fibre-optic communications.

    • Graeme Smith
    •  & John A. Smolin
  • Letter |

    The Dirac equation successfully merges quantum mechanics with special relativity. It predicts some peculiar effects such as 'Zitterbewegung', an unexpected quivering motion of a free relativistic quantum particle. This and other predicted phenomena are key fundamental examples for understanding relativistic quantum effects, but are difficult to observe in real particles. Here, using a single trapped ion set to behave as a free relativistic quantum particle, a quantum simulation of the one-dimensional Dirac equation is demonstrated.

    • R. Gerritsma
    • , G. Kirchmair
    •  & C. F. Roos