Dynamics of Photoinduced Entanglement in Electron-Phonon Systems

We study the entanglement dynamics of electron-phonon systems under photoirradiation, employing a coupled spin-boson model. Competition between antiferromagnetic spin-ordering and the dynamical Jahn-Teller effect realizes two types of the ground state, which shows different dynamical behavior by photoirradiation. We showed that, using a two-stage singular value decomposition on the time-dependent wavefunction, the quantum nature of irradiated light plays an important role in considering a design and/or manipulation methods of the quantum-mechanical states of electron-phonon systems in coherent regime.