Domain walls in superfluid ${}^3\mathrm{He}\text{−}B$ have gained renewed interest in light of experimental progress on confining helium in nanofabricated geometries. Here, we study the effect of strong-coupling corrections on domain wall width and interfacial tension by determining self-consistent solutions to spatially-dependent Ginzburg-Landau equations. We find that the formation of domain walls is generally energetically favored in strong coupling over weak coupling. Calculations were performed over a wide range of temperatures and pressures, showing decreasing interface energy with increasing temperature and pressure. This has implications for the observability of such domain walls in ${}^3\mathrm{He}\text{−}B$, which are of both fundamental interest and form the basis for spatially-modulated pair-density wave states, when stabilized by strong confinement.

中文翻译：

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超流体He3-B中硬畴壁的强耦合校正

超流体中的畴壁 ${}^3他\text{-}乙$鉴于在纳米制造几何形状中限制氦气的实验进展，他们重新获得了兴趣。在这里，我们通过确定空间相关的 Ginzburg-Landau 方程的自洽解来研究强耦合校正对畴壁宽度和界面张力的影响。我们发现，在强耦合中，畴壁的形成通常比弱耦合在能量上更有优势。计算是在很宽的温度和压力范围内进行的，结果表明界面能随着温度和压力的增加而降低。这对此类畴壁的可观察性有影响${}^3他\text{-}乙$，当通过强限制稳定时，它们既具有基本意义，又构成空间调制对密度波状态的基础。