用Keldysh方法研究多连通相互作用系统的输运
Transport through a multiply connected interacting meso-system using the Keldysh formalism
摘要：
我们应用Keldysh形式主义，以获得一个当前的公式易于使用的系统与许多网站，其中之一是相互作用。主要的技术挑战是处理较小的格林函数。结果表明，在左右对称的情况下，不需要小格林函数的知识，仅用滞后格林函数就可以表达精确的电流公式.应用于一个三角形干涉仪，它给出了一个很好的帐户的Fano-近藤效应。据发现，在近藤相关的背景下，干扰效应，引起的参数空间中的电导是温度无关的一个点。我们包括一个比较的结果，从Ng的ananonymous，这是不太准确的，但也可以使用在上述对称性的情况下。
英文摘要：
We apply the Keldysh formalism in order to derive a current formula easy to use for a system with many sites, one of which is interacting. The main technical challenge is to deal with the lesser Green function. It turns out that, in the case of the left-right symmetry, the knowledge of the lesser Green function is not necessary and an exact current formula can be expressed in terms of retarded Green functions only. The application is done for a triangular interferometer which gives a good account of the Fano-Kondo effect. It is found that the interference effects, in the context of Kondo correlations, give rise to a point in the parameters space where the conductance is temperature-independent. We include a comparison with the results from the Ng's ansatz, which are less accurate, but can be used also in the absence of the above mentioned symmetry.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
