In this paper the secrecy problem in the cognitive state-dependent interference channel is considered. In this scenario we have a primary and a cognitive transmitter-receiver pairs. The cognitive transmitter has the message of the primary sender as side information. In addition, the state of the channel is known at the cognitive encoder. Hence, the cognitive encoder uses this side information t...

A remarkable feature of the Landau–Zener transition is insensitivity survival probability to decay rate, τ−1, excited state. Namely, for a particle which initially (at t→−∞) in ground state remain at t→∞ same insensitive τ−1 due e.g. coupling continuum (Akulin and Schleich, 1992). This was demonstrated case when density states energy-independent. We study opposite limit step-like function energ...