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Full-Text Articles in Physical Sciences and Mathematics
Minimizing Decoherence In Optical Fiber For Long Distance Quantum Communication, Manish Kumar Gupta
Minimizing Decoherence In Optical Fiber For Long Distance Quantum Communication, Manish Kumar Gupta
LSU Doctoral Dissertations
In this research work, I have derived analytical models for decoherence of quantum states of light and developed techniques based on Dynamical Decoupling (DD) to preserve the quantum state of polarization qubit and Orbital Angular Momentum (OAM) qudit in single-mode, multi-mode and specialized optical fibers. In subsequent work, I have derived the analytical model for decoherence of an entangled state in an optical fiber to show that such a decoherence causes loss of entanglement. I also showed that such states can be preserved with DD. In Chapter 1, I have introduced the subject of a quantum computer and its relation …
Feedback Control Theory In Stochastic Dynamical Systems, Ashkan Balouchi
Feedback Control Theory In Stochastic Dynamical Systems, Ashkan Balouchi
LSU Doctoral Dissertations
A stochastic dynamical system is a system composed of many interacting components which includes stochastic behavior. Feedback control theory is designed to use information from the current state of the system in order to temper the final state toward the desired outcome. In this dissertation, I perform studies on two choices of classic and quantum dynamical systems to cover vast variety of statistical tools and methods. For classical model, I perform a study on finite-size effects at the phase transition in the Nagel-Schreckenberg traffic model as an example of non-equilibrium many body stochastic dynamical system. For quantum mechanical model, I …