Quantum physics articles within Nature Materials

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  • News & Views |

    The coupling of monolayer tungsten diselenide and a photonic-crystal cavity leads to ultralow-threshold lasing.

    • Vinod Menon

  • News & Views |

    Individual spins, associated with vacancies in the silicon carbide lattice, have been observed and coherently manipulated. This may offer new directions for integrated spintronic devices.

    • Andrea Morello

  • Article |

    The valley degree of freedom has been proposed as a means to encode information in a number of condensed-matter systems. Now, detailed scanning tunnelling microscopy measurements are used to spatially resolve the valleys associated with a single donor qubit in silicon.

    • J. Salfi
    • , J. A. Mol
    •  & S. Rogge

  • Letter |

    The photoluminescent properties of electron spins at nitrogen–vacancy (NV) centres are promising for use in quantum information and magnetometry. It is now shown that the coherence times of NV centres in nanodiamonds can be engineered to be comparable to those of bulk diamond.

    • Helena S. Knowles
    • , Dhiren M. Kara
    •  & Mete Atatüre

  • Letter |

    Quantum wells based on mercury telluride are an experimental realization of a two-dimensional topological insulator. By using a scanning superconducting quantum interference device (SQUID) technique, the magnetic fields flowing through HgTe/CdTe heterostructures are imaged both in the quantum spin Hall and the trivial regimes, revealing the edge states associated with the quantum spin Hall state.

    • Katja C. Nowack
    • , Eric M. Spanton
    •  & Kathryn A. Moler

  • Editorial |

    The properties of semiconductor quantum dots can now be controlled down to the level of single electrons and spins. These solid-state 'artificial atoms' have inspired scientists to look at them as possible building blocks for realizations of quantum computers, with unexpected consequences.

    • Hugo Ribeiro
    •  & Guido Burkard

  • Commentary |

    Semiconducting quantum dots have been extensively investigated with the idea of using single spins for quantum computing. Whereas access to single electrons and their spins has become routine, the challenges posed by nuclear spins remain ever present.

    • Hugo Ribeiro
    •  & Guido Burkard

  • News & Views |

    Both electronic and nuclear spins have their pros and cons for quantum information processing. A silicon-based hybrid electronic–nuclear system can make the best of both properties.

    • Nan Zhao
    •  & Jörg Wrachtrup

  • Letter |

    Solid-state spin qubits offer promise as building blocks for quantum computers. Now, efficient quantum control is demonstrated over hybrid nuclear–electronic qubits in bismuth-doped silicon, as a consequence of the strong hyperfine interactions in this system.

    • Gavin W. Morley
    • , Petra Lueders
    •  & Tania S. Monteiro

  • News & Views |

    The demonstration of strong coupling between electromagnetic fields and excited molecular states represents a powerful new strategy for controlling quantum-mechanical states and chemical reaction dynamics.

    • Anna Fontcuberta i Morral
    •  & Francesco Stellacci

  • News & Views |

    Results from a cubic heavy-fermion compound provide a new perspective on quantum criticality in these types of material.

    • Piers Coleman

  • Letter |

    A quantum critical point occurs when different stable phases of matter are in equilibrium at absolute zero temperature. Describing quantum criticality with a theoretical framework that unifies different types of transitions is highly desirable to understand how phenomena such as superconductivity and magnetism interact in correlated electron systems. A study now provides an indication of an underlying universality of quantum criticality, and highlights the role of dimensionality in such a unified theory.

    • J. Custers
    • , K-A. Lorenzer
    •  & S. Paschen

  • Article |

    The coherence lifetime of a material system to be used in quantum information protocols has to be long enough for several quantum operations to occur before the system loses its quantum coherence. The spins of impurities in silicon have been shown to have coherence lifetimes up to tens of milliseconds, but now all records are beaten with those in high-purity silicon reaching a few seconds.

    • Alexei M. Tyryshkin
    • , Shinichi Tojo
    •  & S. A. Lyon

  • News & Views |

    The ability to control the nuclear spins in a semiconductor quantum dot is an important step towards a long-lived and controllable electron spin qubit.

    • Guido Burkard

  • News & Views |

    The latest advances in our understanding of correlated electron systems have implications that range from fundamental physics such as string theory to novel applications including the manipulation and retrieval of electron spin.

    • Leon Balents
    •  & Zhi-Xun Shen

  • News & Views |

    Nitrogen-vacancy centres in diamond are very promising candidates for quantum information processing in the solid state. However, a search to find defects with even more potential has now been launched.

    • David DiVincenzo

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