arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0709.3668hep-th
收藏

一个或几个扭结上的费米子

Fermions on one or fewer Kinks

Yi-Zen Chu, Tanmay Vachaspati

摘要:

我们在Z_2扭结上找到了费米子束缚态的全谱。除零模外,还有int[2 m_f/m_s]束缚态,其中m_f为费米子,m_s为标量质量。我们还研究了费米子模式的背景下,一个分离的扭结反扭结对。利用变分方法,我们证明了在这个背景中至少存在一个束缚态,并且这个束缚态的能量随着扭结-反扭结间距的增加而趋于零,并且比e^{-a2 L}更快,其中a = min(m_s,2 m_f).通过数值计算,我们发现一些低的束缚态明确。

英文摘要:

We find the full spectrum of fermion bound states on a Z_2 kink. In addition to the zero mode, there are int[2 m_f/m_s] bound states, where m_f is the fermion and m_s the scalar mass. We also study fermion modes on the background of a well-separated kink-antikink pair. Using a variational argument, we prove that there is at least one bound state in this background, and that the energy of this bound state goes to zero with increasing kink-antikink separation, 2L, and faster than e^{-a2L} where a = min(m_s, 2 m_f). By numerical evaluation, we find some of the low lying bound states explicitly.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑