Dresden 2009 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 11: Transport: Nanoelectronics I - Quantum Dots and Wires, Point Contacts 2

TT 11.9: Talk

Monday, March 23, 2009, 16:15–16:30, HSZ 301

Understanding energy-resolved spectroscopy of nonequilibrium Luttinger liquids — •So Takei, Mirco Milletari, and Bernd Rosenow — Max-Planck-Institute for Solid State Research

We theoretically analyze a system in which a measurement of an energy-resolved nonequilibrium electronic distribution can be used to gain an understanding on the relaxational properties of a Luttinger liquid (LL). The setup consists of a LL tunnel-coupled to two resonant levels, denoted source and probe, at two points separated by a distance L. The source, whose resonant level is tuned above the chemical potential of the LL, injects high energy electrons into the system. An energy-resolved measurement of the LL distribution is then achieved downstream with the probe by tuning its resonant level. An experimental realization of the setup can be achieved in the context of an edge state in the fractional quantum Hall regime for both the Laughlin sequence of filling fractions ν=1/m and the hierarchical edge states with multiple edge excitations.