Quantum computing is an emerging technology with the potential to have a significant impact on science and technology. Organised into four parts, this comprehensive second edition covers topics such as the basic concepts of quantum computing alongside quantum implementation of different circuits; the fault tolerant concepts of quantum computing; the concept of QCA alongside the design processes of different QCA circuits; and an overview of QCA fault-tolerant circuits and their design procedures. In addition to updates to first edition chapters to reflect developments in recent years, this new edition sees the inclusion of problems to every chapter and eight new chapters. This book will be a great help for quantum computing researchers, faculty members and students who can develop a working understanding of circuit-based quantum computing. Key Features Contains eight new chapters as a significantly extended new edition Encompasses developments in the area, with a special focus on quantum cellular automata Is suitable as a supplementary text in advanced courses Includes problems within every chapter