We study the quantum properties of an oscillator in proper time. This time is a particle model with mass that on shell. Its internal can be treated as self-adjoint operator. The displaced and rate obey uncertainty relation resembling one between position momentum, which different from usual energy-time relation. In addition, we demonstrate matter field oscillators satisfies Klein-Gordon equatio...

Prescribed-time (PT) control for nonlinear systems, originated from Song et al., has gained increasing attention among the community. The salient feature of PT lies in its ability to achieve system stability within a finite settling time user-assignable advance irrespective initial conditions. It is such unique that enticed many follow-up studies on this technically important area, motivating n...