Condensed Matter Physics Seminar
2 p.m., Thursday, October 3, 2002
Room 1201, Physics Building
Zerodimensional Fermi liquid
(Princeton/NECI)
Abstract: What does it mean  Fermi liquid? In spite of the fact
that this paradigms discussed for almost half a century there are still
disagreements about its very meaning. In its original version the Fermi liquid
theory interacting fermions was based on the translation invariance, i.e., on
the fact that each elementary excitation can be characterized by its momentum.
Does it mean that any quenched disorder destroys the Fermi liquid state? In
order to get an insight we will consider general properties of interacting
fermions confined within a finite volume. It turns out that in the
case when oneparticle motion is chaotic the theoretical description of the
system can be dramatically simplified. More precisely, the low energy
behavior is determined by a zerodimensional Hamiltonian, which contains at most
three unknown coupling constants. We will see that this description is in all
respects similar to the Fermiliquid one. To illustrate this Fermiliquidlike
approach we will discuss effects of the exchange interaction on the charge
transport through Quantum Dots.

Host: Prange
Back to Condensed Matter Physics Seminar Home
Page