Two-step Dynamics of Photoinduced Phonon Entanglement Generation between Remote Electron-Phonon Systems

The generation of quantum entanglement between phonons in photoirradiated remote electron-phonon systems is numerically studied. Upon excitation by a visible/ultraviolet laser pulse, the entanglement of electrons is immediately generated and that of phonons follows via electron-phonon interactions, i.e., the entanglement generation of phonons is a two-step process. Therefore, it is important to design the temporal properties of incident optical pulses in order to control the entanglement of electrons and/or phonons. These features are revealed by the quantum mutual information and the composite modes derived from the Heisenberg equation of motion. The calculated results also show that the dynamics of the phonon entanglement can be observed by time-resolved spectroscopy on the scattered light.

Automated summary

This study numerically investigates the generation of phonon quantum entanglement in photoirradiated remote electron-phonon systems. It is found that the generation of phonon entanglement is a two-step process that can be controlled by designing the temporal properties of incident optical pulses. The dynamics of phonon entanglement can be observed through time-resolved spectroscopy on the scattered light.