E-viri
PDF
Recenzirano
Odprti dostop
-
Otto, A.; Seipt, D.; Blaschke, D.; Kämpfer, B.; Smolyansky, S.A.
Physics letters. B, 01/2015, Letnik: 740Journal Article
The dynamically assisted pair creation (Schwinger effect) is considered for the superposition of two periodic electric fields acting in a finite time interval. We find a strong enhancement by orders of magnitude caused by a weak field with a frequency being a multitude of the strong-field frequency. The strong low-frequency field leads to shell structures which are lifted by the weaker high-frequency field. The resonance type amplification refers to a new, monotonously increasing mode, often hidden in some strong oscillatory transient background, which disappears during the smoothly switching off the background fields, thus leaving a pronounced residual shell structure in phase space.
