Violations of Bell Inequality, Cauchy—Schwarz Inequality and Entanglement in a Two-Mode Three-Level Atomic System

摘要

Violations of Bell inequality, Cauchy–Schwarz inequality and entanglement in a two-mode three-level atomic system are investigated. It is shown that there are some states, which are entangled but do not violate Bell inequality in this system. Moreover, the relations of violations of Bell inequality, Cauchy–Schwarz inequality, and entanglement are discussed in detail.