Speaker
Description
We present a fundamental QED theory for superradiance of bunched electrons - the enhanced coherent spontaneous emission of a correlated electron beam in an FEL configuration or in a variety of other free-electron radiation mechanisms. We derive the buildup of a quantum radiation state by multiple electrons in a configuration of a narrow beam of quantum electron wavepackets passing by a dielectric high quality factor micro-resonator.
As in Dicke’s superradiance of atoms, we show that the mysterious correlation between the emissions of individual electrons originates from their entangled coupling to the same quantum radiation state. Using an iterative process for the buildup of photons in a single mode quantum radiation state by an ensemble of modulation-correlated quantum-electron wavepackets, we confirm the quadratic growth of the photons number with the number of electrons N. Furthermore, we find nonclassical features in the measurable quadrature phase-space of the radiation state and its photon statistics.
