Quantum synchronization: insights and applications to quantum information processing

• Main Author: Shen, Yuan
• Other Authors: Fan Weijun
• Format: Thesis-Doctor of Philosophy
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Physics; Quantum physics; Quantum information processing
• Online Access: https://hdl.handle.net/10356/175840
• Institution: Nanyang Technological University

This thesis explores various aspects of quantum synchronization, presenting novel perspectives and methodologies for studying nonlinear systems. By exploring different nonlinear oscillators, we study the interplay of nonlinear phenomena, like amplitude death and quantum synchronization, with information theoretic measures like Fisher information and quantum entanglement. We look at some some possible applications in superconducting circuit quantum electrodynamics (cQED) platform. Building on a robust theoretical framework encompassing appropriate quantum master equations, quantum stochastic differential equations, and quantum trajectory techniques, this research uncovers genuine quantum phenomena in synchronization, particularly in highly nonlinear quantum oscillators. Innovative entanglement generation techniques and new measures to capture quantum synchronization are proposed and analyzed, shedding light on their potential applications in the field of quantum information technologies. Moreover, this thesis examines counter-intuitive behaviors in coupled quantum oscillators, which are vital for understanding quantum nonlinear dynamics. These findings substantially contribute to our knowledge and utilization of quantum synchronization phenomena. It also paves the way for practical applications in quantum technologies using superconducting circuit QED.