Coleman P, Hooley C, Parcollet O
Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
Phys Rev Lett. 2001 Apr 30;86(18):4088-91. doi: 10.1103/PhysRevLett.86.4088.
We examine the two-lead Kondo model for a dc-biased quantum dot in the Coulomb blockade regime. From perturbative calculations of the magnetic susceptibility, we show that the problem retains its strong-coupling nature, even at bias voltages larger than the equilibrium Kondo temperature. We give a speculative discussion of the nature of the renormalization group flows and the strong-coupling state that emerges at large voltage bias.
我们研究了处于库仑阻塞区的直流偏置量子点的双引线近藤模型。通过对磁化率的微扰计算，我们表明即使在偏置电压大于平衡近藤温度时，该问题仍保持其强耦合性质。我们对重整化群流的性质以及在大电压偏置下出现的强耦合态进行了推测性讨论。
