论文标题
由于中性交换而导致的量子大厅制度中的电子配对
Electron-pairing in the quantum Hall regime due to neutralon exchange
论文作者
论文摘要
电子在冷凝物质系统中的行为主要取决于排斥性的库仑相互作用。但是，在特殊情况下，库仑相互作用可以有效地吸引人，从而在非常规超导体和专门设计的中学设置中产生电子配对。在量子厅系统中，由于Landau水平的巨大变性，电子相互作用可以发挥着特别重要的作用，例如，具有分数电荷和任何统计量的准粒子出现。量子厅Fabry-Pérot（FPI）干涉仪由于能够探究这种外来物理学的能力而引起了越来越多的关注。另外，这种干涉仪会以电子相互作用本身以有趣的方式影响。最近，发现了量子厅FPI中电子配对的实验证据（H.K. Choi等，Nat。Comm6，7435（2015））。从理论上讲，在强反向散射的极限和筛选的库仑相互作用的影响下，我们计算电子射击噪声，并确实找到了某些参数的增强的Fano因子，这表明电子配对。由于中性边缘等离子体，所谓的中源，通过电子相互作用来解释该结果。
The behavior of electrons in condensed matter systems is mostly determined by the repulsive Coulomb interaction. However, under special circumstances the Coulomb interaction can be effectively attractive, giving rise to electron pairing in unconventional superconductors and specifically designed mesoscopic setups. In quantum Hall systems electron interactions can play a particularly important role due to the huge degeneracy of Landau levels, leading for instance to the emergence of quasi-particles with fractional charge and anyonic statistics. Quantum Hall Fabry-Pérot (FPI) interferometers have attracted increasing attention due to their ability to probe such exotic physics. In addition, such interferometers are affected by electron interactions themselves in interesting ways. Recently, experimental evidence for electron pairing in a quantum Hall FPI was found (H.K. Choi et al., Nat. Comm 6, 7435 (2015)) . Theoretically describing an FPI in the limit of strong backscattering and under the influence of a screened Coulomb interaction, we compute electron shot noise and indeed find a two-fold enhanced Fano factor for some parameters, indicative of electron pairing. This result is explained in terms of an electron interaction due to exchange of neutral inter-edge plasmons, so-called neutralons.
