| 講師 | Prof. Antti Niemi (Uppsala Univ., Sweden) |
|---|---|
| タイトル | Splitting the Gluon? |
| 日時 | 2005年5月13日(金) 14:30-16:00 |
| 場所 | 理学系総合研究棟1号館(理学部1号館) 405号室 |
| 連絡先 | 理学部物理学科素粒子論研究室 セミナー係 住友洋介 |
| 概要 | In the strongly correlated environment of high-temperature cuprate superconductors, the spin and charge degrees of freedom of an electron seem to separate from each other. A similar phenomenon may be present in the strong coupling phase of Yang-Mills theories, where a separation between the color charge and the spin of a gluon could play a role in color confinement. Here we study the phase structure of a decomposed SU(2) Yang-Mills theory in a mean field approximation, by inspecting quantum fluctuations in the condensate which is formed by the color charge component of the gluon field. Our results suggest that the decomposed theory has an involved phase structure. In particular, there appears to be a phase which is quite reminiscent of the superconducting phase in cuprates, and this phase is a natural candidate for describing color confinement. We also find evidence for an intermediate pseudogap phase that separates this confining phase from the asymptotically free theory. |
