Volume 4 Issue 2, February 2008

Volume 4 Issue 2

A superconducting current running in a closed loop is an ideal demonstration of quantum physics. As all the electrons have the same wavefunction, the amount of magnetic field that can pass through the ring – the magnetic flux – must be quantized in units of the Planck constant, h, divided by the total charge. But in a superconductor, the electrons are bound into pairs, so the total charge is 2e, yielding a fluxoid of h/2e – a hallmark of superconductivity. Now, however, Florian Loder and co-workers show that for certain superconductors, a fluxoid of h/e is possible.

Editorial

  • Editorial |

    We want to hear from physicists what kind of tools would help in managing the ever-growing tide of information from, and the exciting possibilities of, the internet.

Thesis

Books and Arts

Research Highlights

News and Views

  • News & Views |

    It is 25 years since the workshop that marked the birth of the inflationary Universe and the laying of the theoretical foundations of modern cosmology. Following a flood of data, the inflationary scenario is on its way to being established.

    • Michael S. Turner
  • News & Views |

    Synchrotron radiation generated using an electron beam from a laser-driven accelerator opens the possibility of building an X-ray free-electron laser hundreds of times smaller than conventional facilities currently under construction.

    • Kazuhisa Nakajima
  • News & Views |

    The rates of chemical reactions in a cell are limited by the time it takes the reactants to find each other through brownian motion. Thus diffusion determines the timescales of life — but can some reactions beat the diffusion limit?

    • Leonid Mirny
  • News & Views |

    The relationship between high-temperature superconductivity and the pseudogap state is further probed by an atomic-scale study that shows that what was believed to be a signature of the superconducting state exists in both states.

    • Wei-Sheng Lee
    •  & Zhi-Xun Shen
  • News & Views |

    Quantum entanglement is a vital resource in quantum information science. A theoretical framework now provides a better understanding of how these non-classical correlations decay in a real environment.

    • Christian Roos

Letters

Articles

Futures

  • Futures |

    The facts are not enough.

    • Marissa Lingen