TY - JOUR T1 - Quantum entanglement due to nonlinear interaction between a moving three-level atom and a two-mode field with two-photon transitions TT - درهم‌تنیدگی کوانتومی ناشی از برهم‌کنش غیرخطی یک اتم سه‌ترازی در حال حرکت با یک میدان دومدی با گذارهای دو فوتونی JF - opsi JO - opsi VL - 21 IS - 0 UR - http://opsi.ir/article-1-471-en.html Y1 - 2015 SP - 257 EP - 260 KW - Moving three-level atom KW - Two-mode field KW - Two-photon transition KW - Intensity-dependent coupling KW - Quantum entanglement N2 - In this paper, an analytical model for the interaction between a moving Λ-type three-level atom and a two-mode radiation field is presented with two-photon transitions and in the intensity-dependent coupling regime. After specifying the initial conditions for the atom and the field, the explicit form of the state vector of the entire system is obtained via the time evolution operator. In order to study the entanglement between subsystems, atom and field, temporal behavior of the von Neumann entropy, as a measure of entanglement, is examined. M3 ER -