Observing Majorana bound states in p-wave superconductors using noise measurements in tunneling experiments
Observing Majorana bound states in p-wave superconductors using noise measurements in tunneling experiments
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DOI：
10.1103/physrevlett.98.237002
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发表时间：
2007-06-08
影响因子：
8.6
通讯作者：
Demler, Eugene
中科院分区：
文献类型：
--
作者：
Bolech, C. J.;Demler, Eugene
在手征p波超导体的边缘或涡核处的零能束缚态应该表现为马约拉纳费米子。我们引入一个模型哈密顿描述的隧穿过程中，电子注入到这样的状态。使用非平衡绿色函数的形式主义，我们找到确切的解析表达式的隧穿电流和噪声，并确定实验签名的马约拉纳性质的束缚态中发现的散粒噪声。我们讨论的背景下，不同的候选材料，支持三重态超导的结果。实验验证中能隙态的Majorana性质对拓扑量子计算的前景具有重要意义。
The zero-energy bound states at the edges or vortex cores of chiral p-wave superconductors should behave like Majorana fermions. We introduce a model Hamiltonian that describes the tunneling process when electrons are injected into such states. Using a nonequilibrium Green function formalism, we find exact analytic expressions for the tunneling current and noise and identify experimental signatures of the Majorana nature of the bound states to be found in the shot noise. We discuss the results in the context of different candidate materials that support triplet superconductivity. Experimental verification of the Majorana character of midgap states would have important implications for the prospects of topological quantum computation.