Nonequilibrium transport at a dissipative quantum phase transition.
Nonequilibrium transport at a dissipative quantum phase transition.
复制标题
耗散量子相变的非平衡输运
DOI：
10.1103/physrevlett.102.216803
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发表时间：
2009
影响因子：
8.6
通讯作者：
P. Wölfle
中科院分区：
文献类型：
--
作者：
C.-H. Chung;K. LeHur;M. Vojta;P. Wölfle
我们研究了耗散共振能级模型在量子相变附近的非平衡输运，该模型在纳米系统中有许多应用。我们建立了严格的映射，并应用受控的频率相关重整化群方法来计算有限偏置电压和有限温度下的非平衡电流。因为，我们发现，电导有其众所周知的平衡形式，而它在有限电压下表现出明显的非平衡分布。
We investigate the nonequilibrium transport near a quantum phase transition in a generic and relatively simple model, the dissipative resonant level model, that has many applications for nanosystems. We formulate a rigorous mapping and apply a controlled frequency-dependent renormalization group approach to compute the nonequilibrium current in the presence of a finite bias voltageand a finite temperature. For, we find that the conductance has its well-known equilibrium form, while it displays a distinct nonequilibrium profile at finite voltage.