| 日時: |
2008-05-14 16:00 - 17:00 |
| 場所: |
研究本館３階３２１号室 |
| 会議名: |
Space-time view of pair creation in strong electromagnetic fields |
| 連絡先: |
土手昭伸 （素核研） |
| 講演者: |
丹治 直人 氏 (東京大学大学院理学系研究科物理学専攻) |
| 講演言語: |
日本語 |
| アブストラクト: |
Pair creation in a uniform classical electromagnetic field (Schwinger
mechanism) is studied focusing on the time evolution of the
distribution of the created particles.
The momentum distribution in the direction of the electric field
(longitudinal direction) has not been known because any longitudinal
momentum-dependence conflicts with the boost invaliant field configuration.
We show the momentum dependence of the particle distribution arise from
the quantization of the field which require to specify a Lorentz frame
breaking the boost invariance.
The time evolution of the distribution function in time-dependent fields
is also presented as well as the effect of the back reaction. |
|
