Recent experiments on short MoGe nanowires show a sharp superconducting-insulating transition at the universal resistance RQ=h/(4e^2), contrary to the expectation of a smooth temperature dependence of the resistance for such Josephson-like systems. We present a self-consistent renormalization-group treatment of interacting quantum phase slips in short superconducting wires, which reproduces this sharp universal transition. Our method should also apply to other systems in the sine-Gordon universality class, in the previously inaccessible intermediate-coupling regime.
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机译：最近在短MoGe纳米线上进行的实验表明，在通用电阻RQ = h /（4e ^ 2）处，出现了尖锐的超导-绝缘转变，这与此类约瑟夫森系统的电阻对温度的平稳依赖性有关。我们提出了一种在超短导线中相互作用的量子相移的自洽重整化组处理，该处理重现了这种尖锐的通用跃迁。我们的方法还应适用于以前无法访问的中间耦合机制中的正弦Gordon通用性类别的其他系统。
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