  We study the current produced in a Tomonaga-Luttinger liquid by an applied
bias and by weak, point-like impurity potentials which are oscillating in time.
We use bosonization to perturbatively calculate the current up to second order
in the impurity potentials. In the regime of small bias and low pumping
frequency, both the DC and AC components of the current have power law
dependences on the bias and pumping frequencies with an exponent 2K - 1 for
spinless electrons, where K is the interaction parameter. For K < 1/2, the
current becomes large for special values of the bias. For non-interacting
electrons with K = 1, our results agree with those obtained using Floquet
scattering theory for Dirac fermions. We also discuss the cases of extended
impurities and of spin-1/2 electrons.
