We analyse the finite temperature charge stiffness D(T > 0), by a generalization of Kohn’s method, for the problem of a particle interacting with a fermionic bath in one dimension. We present… (More)

Exact calculation of spectral properties of a particle interacting with a one dimensional fermionic system. Using the Bethe ansatz analysis as was reformulated by Edwards, we calculate the spectral… (More)

A one-dimensional tight-binding Hamiltonian describes the evolution of a single impurity interacting locally with N electrons. The impurity spectral function has a power-law singularity A(ω) ∝| ω− ω0… (More)