Speaker
Description
We study theoretical possibility of resonant amplification of electromagnetic modes generated by a nonlinear effect in Euler-Heisenberg electrodynamics. Precisely, we examine the possibility of the amplification for the third harmonics induced by a single electromagnetic mode in radiofrequency cavity, as well as the generation of signal mode of combined frequencies induced by two pump modes (ω1 and ω2) in the cavity. To solve the problem, we use two different approaches: first, we solve classical equations of motion obtained from the effective action for signal mode; in second approach we apply pure quantum formalism and calculate the cross-section for the creation of a single quanta of signal mode.
Both approaches have been applied to linear and rectangular cavities. We explicitly show that the third harmonics as well as the mode of combined frequency 2ω1 + ω2 are not resonantly amplified while the signal mode with frequency 2ω1 − ω2 is amplified for a certain cavity
geometry.
