AI 中文总结
研究通过空间调制悬浮碳纳米管局部电势，利用与凝聚态系统类比展示大能隙，该能隙均匀且可在约两个数量级内调节，能使电子系统在低温下从绝缘态变近金属态，为量子器件控制纳米尺度低能谱提供新方式。
AI 中文摘要
利用外部物理参数控制纳米尺度下的低能谱已成为量子器件的重要资源。能隙的出现是一个关键特征，与量子信息处理所需的退相干缓解相关。一般而言，高能不受控激发的有害影响只能在特定调谐点消除。实现能隙是在有限参数空间区域扩展退相干对策的自然方式。鉴于近期自上而下构建超导拓扑链的努力，这尤为有用。本文通过空间调制悬浮碳纳米管的局部电势，利用与凝聚态系统的类比，展示了一个大的能隙。该能隙在纳米管上是均匀的，可在约两个数量级内调节，使电子系统在低温下从绝缘态转变为近金属态。
英文摘要
Controlling the low energy spectrum at the nanoscale with an external physical parameter has become an important resource for quantum devices. The emergence of an energy gap is one such key feature, linked to the mitigation of decoherence needed for quantum information processing. Indeed, the detrimental effects of high-energy uncontrolled excitations can only be cured at some specific tuning points in general. Achieving an energy gap is a natural way to extend decoherence countermeasures over a finite region of parameter space. This would be particularly useful in view of the recent efforts to build superconducting topological chains in a top-down approach. In this work, we demonstrate a large energy gap by spatially modulating the local potential of a suspended carbon nanotube, exploiting an analogy with condensed matter systems. This gap is homogeneous on the nanotube and tunable by about two orders of magnitude, bringing the electronic system from an insulating state to a near-metallic state at low temperatures.
Comments22 pages including supplementary materials
DOI：10.1038/s41467-026-68344-0
