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We calculate the finite-temperature conductance of clean, weakly interactingone-dimensional quantum wires subject to Rashba spin-orbit coupling and amagnetic field. For chemical potentials near the center of the Zeeman gap ($\mu= 0$), two-particle scattering causes the leading deviation from the quantizedconductance at finite temperatures. On the other hand, for $|\mu| > 0$,three-particle scattering processes become more relevant. These deviations area consequence of the strongly nonlinear single-particle spectrum, and are thusnot accessible using Luttinger liquid theory. We discuss the observability ofthese predictions in current experiments on InSb nanowires and in "spiralliquids", where a spontaneous ordering of the nuclear spins at low temperaturesproduces an effective Rashba coupling.

Finite-temperature conductance of weakly interacting quantum wires with Rashba spin-orbit coupling