Eq. (\[q0\_strong\]) for a small Zeeman field: for example at $h = 0.5\,T_{c0}$, $\theta = \pi/
4$ and $\alpha = 0.05\,v_\text{F}$, $q \approx 10^{-10}\,p_\text{F}$, which weakly influences the critical temperature. But these values significantly increase for temperatures smaller than the tricritical temperature, related to the competition between helical and FFLO-like modulations [@agterberg_magnetoelectric_2012]: At large temperatures, the modulation coming from the helical state dominates, whereas below the tricritical temperature $T^\star = 0.56\,T_{c0}$, the modulation stems mainly from the FFLO-like state.

\[sec:level5\] Conclusion
=========================

We have studied the onset of nonuniform superconductivity in a one-dimensional wire in presence of Rashba spin-orbit coupling and Zeeman effect. The spin-orbit coupling stabilizes a FFLO-like modulated order parameter at low field and for all temperature below $T_{c0}$. We have derived the self-consistency relation for the modulated superconducting order parameter in two extreme regimes of weak and strong spin-orbit strength respectively. The analytical expressions for the wavevectors of the modulated state scale as $q \propto h_x^2\,h_z \alpha$ in the weak spin-orbit coupling regime ($\alpha p_\text{F} \ll T_c$), and $q \propto h_x^2\,h_z /\alpha$ in the strong $\alpha$ regime ($\alpha p_\text{F} \gg T_c$). When the ratio $\alpha\,p_\text{F}/h$ increases, superconducting correlations change from interband to intraband, which was also demonstrated 