The visibility of the two-photon interference in Franson interferometer serves as a measure energy-time entanglement photons. We propose to control second-order coherence function by implementing coherent time-delayed feedback mechanism. Simulating non-Markovian dynamics within matrix product state framework, we find that for two photons emitted from three-level system (3LS) ladder configuratio...

a method for solving the descriptor discrete-time linear system is focused. for easily, it is converted to a standard discrete-time linear system by the definition of a derivative state feedback. then partial eigenvalue assignment is used for obtaining state feedback and solving the standard system. in partial eigenvalue assignment, just a part of the open loop spectrum of the standard linear s...

The influence of time delay in systems of two coupled excitable neurons is studied in the framework of the FitzHugh-Nagumo model. A time delay can occur in the coupling between neurons or in a self-feedback loop. The stochastic synchronization of instantaneously coupled neurons under the influence of white noise can be deliberately controlled by local time-delayed feedback. By appropriate choic...

A theory of time-delayed coherent quantum feedback is developed. More specifically, we consider a quantum system coupled to a bosonic reservoir creating a unidirectional feedback loop. It is shown that the dynamics can be mapped onto a fictitious series of cascaded quantum systems, where the system is driven by past versions of itself. The derivation of this model relies on a tensor network rep...

This paper is concerned with a linear quadratic optimal control problem of delayed backward stochastic differential equations. An explicit representation derived for the control, which feedback entire past history and expected value future state trajectory in short period time. To obtain feedback, new class Riccati equations delayed-advanced forward-backward are introduced. Furthermore, unique ...