Beyond the parametric approximation: Pump depletion, entanglement, and squeezing in macroscopic down-conversion
Karthik Chinni, Nicolás Quesada · Physical Review A · 2024
The authors study the dynamics of the pump mode in the down-conversion Hamiltonian using the cumulant expansion method, perturbation theory, and the full numerical simulation. They obtain the properties of the pump mode, such as depletion, entanglement, and squeezing for an experimentally relevant initial state.