[15a-K504-1~8] 3.8 Terahertz technologies

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[15a-K504-8] Frequency dependence of quantum entanglement of SPDC output lights mediated by electron-phonon systems

〇(M1C)Aoi Okuda¹, Hiroaki Minamide², Kunio Ishida¹ (1.Utsunomiya Univ., 2.RIKEN)

Keywords:

entanglement,nonlinear optics

We have been investigating the mechanism of SPDC (spontaneous parametric down-conversion) light generation using an electron-lattice Hamiltonian to explore THz light detection utilizing quantum-entangled photons. This study analyzed the effect of the relationship between the phonon frequency and the signal light frequency on photon number and quantum entanglement. By solving the time-dependent Schrödinger equation and evaluating with quantum mutual information, it was found that entanglement reaches its maximum at resonance but is still partially retained off-resonance. Additionally, quantum entanglement decreases compared to results from perturbative models, demonstrating the influence of the material's quantum state.