Approximations for the waiting time distribution in polling models with and without state-dependent setups

Time-dependent density operator in the r

Time-dependent density operator in the random impulse approximation: I. Connections with the “generalized sudden approximation” for photoionization and electron impact ionization; and II. Relevance to reduced density operators, particle–hole matrices, and propagators for the initial state

✍ Everett G. Larson 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 803 KB

## Abstract A density operator analysis is made of the particle‐ejection (e.g., photoionization) problem in the “generalized sudden approximation” for the case in which the ejected particle is detected but its dynamical properties are not observed. It is shown that the resultant statistical density