Professor Chung-Hou Chung 仲崇厚 (交大電子物理系)

Nonequilibrium transport at a dissipative quantum phase transition

Abstract:
We pioneerly investigate the non-equilibrium transport near a quantum phase transition in a generic and relatively simple case model, the dissipative resonant level model, that has many ramifications in nanosystems. The non-equilibrium feature is provided through the application of a finite bias voltage V. We formulate a rigorous mapping and apply a controlled frequency-dependent renormalization group approach to compute the non-equilibrium current in the presence of a finite bias voltage V. For V--> 0, we find that the conductance has its well-known equilibrium form, while it displays a distinct non-equilibrium profile at finite voltage.

2008 年 11 月 14 日
14:30~15:30

RM 111, New Physics Building