We present a theory of negative Coulomb drag in capacitively coupled quantum wires based on the commensurability of the electron density and the long-range nature of the Coulomb interaction in the Tomonaga-Luttinger liquid. The commensurability introduces a notion of doped particles and holes. We point out that the long-range interaction allows a particle-hole pairing over the wires and that the particle-hole pairing brings about the positive drag of holes, that is, the negative drag.
@article{arxiv.1503.02499,
title = {Negative Coulomb Drag in Coupled Quantum Wires},
author = {Shunsuke C. Furuya and Hiroyasu Matsuura and Masao Ogata},
journal= {arXiv preprint arXiv:1503.02499},
year = {2015}
}