扭结上的激发费米子和狄拉克海
Excited fermions on kinks and the Dirac sea
摘要：
我们研究了最近发现的扭结孤子的量子效应，这些孤子是通过耦合到一个单一的激发态费米子束缚态而自洽地构造的。我们的研究是基于这样的观察，即在半经典展开中，这个单能级的能量和狄拉克海的能量应该被同等对待。对于这些扭结解，我们计算狄拉克海的能量作为费米子真空极化能量。我们发现它是实质性的，并且通常超过结合单个能级所获得的能量。
英文摘要：
We study quantum effects of recently discovered kink solitons which are constructed self-consistently by coupling to a single, excited fermion bound state. Our studies are based on the observation that in a semi-classical expansion the energies of this single level and of the Dirac sea should be treated equally. For these kink solutions we compute the energy of the Dirac sea as the fermion vacuum polarization energy. We find it to be substantial and to typically outweigh the energy gain from binding the single level.
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