Measuring fractional charge in carbon nanotubes

Thr Luttinger model of the one-dimensional Fermi gas is the cornerstone of modern understanding of interacting electrons in one dimension. In fact. the enormous class of systems whose universal behavior is adiabatically: connected to it are now deemed Luttinger liquids. Recently, it has been shown that metallic single-walled carbon nanotubes are almost perfectly described by the Luttinger Hamiltonian. indeed, strongly non-Fermi liquid behavior has been observed in a variety of DC transport experiments, in ver. good agreement with theoretical predictions. Here, we describe how fractional quasiparticle charge. a Fundamental property of Luttinger liquids, can be observed in impurity-induced shot noise.