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Circuit-QED and Quantum Feedback Control

Abstract

Quantum computation and quantum information are an emerging research field that involves both physics, computer science, and engineering. The quantum nature of our world can be harnessed to dramatically improve the way we store, transmit, and process information. The first part (Chap. 1) of this thesis presents the theory behind quantum information science and gives a survey of some fascinating topics in this area. The second part (Chap. 2 and 3) studies dissipative quantum systems, which helps us understand the challenges facing all real quantum information processors. The third part (Chap. 4 and 5) discusses how we may use control strategies to fight dissipation and protect quantum information. The last part (Chap. 6 and 7) of this thesis describes circuit-QED systems, a solid state implementation of quantum computers that has become increasingly popular over the years due to great controllability and scalability. Most of my independent contributions are contained in Chap. 3, 4, 5, and Sec. 6.3.1, 7.3.

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