We show that when the time reversal symmetry is broken in a multicomponent superconducting condensate without inversion symmetry the resulting Bogoliubov quasiparticles generically exhibit mini-Bogoliubov-Fermi (BF) surfaces, for small superconducting order parameter. The absence of inversion symmetry makes the BF surfaces stable with respect to weak perturbations. With sufficient increase of the order parameter, however, the Bogoliubov-Fermi surface may disappear through a Lifshitz transition, and the spectrum this way become fully gapped. Our demonstration is based on the computation of the effective Hamiltonian for the bands near the normal Fermi surface by the integration over high-energy states. Exceptions to the rule, and experimental consequences are briefly discussed.

中文翻译：

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非中心对称多组分超导体中的Bogoliubov-Fermi曲面

我们显示，当在没有反演对称性的多组分超导凝析物中打破时间反转对称性时，对于小的超导阶次参数，所得的Bogoliubov准粒子通常会显示出迷你Bogoliubov-Fermi（BF）表面。缺乏反演对称性使得BF表面相对于微扰稳定。但是，随着阶数参数的充分增加，Bogoliubov-Fermi表面可能会通过Lifshitz跃迁消失，并且这种方式的光谱会完全消失。我们的论证基于通过高能态积分对正常费米表面附近的有效哈密顿量的计算。简要讨论该规则的例外情况和实验结果。