| speaker: | Herbert Schoeller Aachen, Germany |
| time: | Tu., 21.08, 9:00-9:50 |
In this talk the status of nonequilibrium renormalization group (RG) and transport through molecular magnets is summarized. For RG methods in real-times a new frequency cutoff on the imaginary axis is proposed, providing a unified approach to equilibrium and nonequilibrium problems. Applying this technique in combination with a formerly derived real-time RG method to problems of dissipative quantum mechanics, it is shown that decay rates cut off the RG flow generically. For quantum wires it is shown that nonequilibrium occupation probabilities lead to a modification of power law exponents. Quantum transport through single molecular magnets offers many interesting phenomena to be analysed by RG. We show various quantum-tunneling induced Kondo and Berry-phase effects in such systems being tunable by external magnetic fields.