Quantum Computing with Superconducting Qubits and Cavities: Concepts and Technology

Build quantum computers using superconducting qubits and microwave cavity technology

Creating qubits with sufficiently long coherence times remains one of the central challenges in building practical quantum computers. Quantum Computing with Superconducting Qubits and Cavities unites the latest advances in superconducting qubits, ultra-high-Q microwave cavities, and cavity–transmon architectures that are emerging as one of the leading platforms for scalable, fault-tolerant quantum computing. By combining conceptual insight with practical implementation, the book equips readers to understand not only how these systems work, but why they are at the forefront of the quantum technology revolution.

The book explores quantum computation using bosonic modes, Fock states, qudits, quantum memories, and modern bosonic error-correcting codes including cat, binomial, and GKP encodings. Fundamental concepts are developed through clear physical explanations, while rigorous mathematical treatments are introduced where needed to provide a deeper understanding. Dedicated reviews of the underlying principles of quantum physics make the material accessible to newcomers without sacrificing the depth expected by researchers and practicing engineers.

Quantum Computing with Superconducting Qubits and Cavities also includes:

• Design principles and operation of superconducting transmon qubits integrated with high-coherence microwave cavities for scalable quantum architectures.
• Bosonic quantum error-correction strategies that dramatically extend coherence and move quantum computing closer to fault-tolerant operation.
• Applications of quantum computing, including integer factoring, database searching, quantum chemistry, condensed-matter physics, and materials science simulations beyond the reach of classical computers.
• Materials science, fabrication methods, and surface treatments that continue to drive record improvements in qubit and cavity coherence.
• The global race toward quantum computing, including major international investments and the rapidly expanding role of superconducting quantum technologies.

Written for physicists, materials scientists, electrical engineers, computer scientists, graduate students, and researchers entering quantum information science, this book provides both the theoretical foundation and the practical knowledge needed to engage with one of the fastest-growing fields in modern science and engineering.

Hasan Padamsee is Professor Emeritus of Cornell University, where he led the Radiofrequency Superconductivity Program. He subsequently served as Head of the Technical Division and Chief Technology Officer at Fermilab, bringing decades of experience in superconducting technology to this work.

Tanay Roy is an Associate Scientist at the Superconducting Quantum Materials and Systems Center at Fermilab, Batavia, Illinois, where he also serves as Deputy Head of the Architectures and Use Cases Thrust, contributing directly to quantum architecture research and development.

Alexander Romanenko is Quantum Technology Thrust Leader at the US Department of Energy Quantum Information Science Research Center at Fermilab, Batavia, Illinois, where he directs research programs focused on advancing superconducting quantum technology and systematic qubit performance optimization.

Anna Grassellino is Senior Scientist, Chief Technology Officer and Associate Lab Director for Technology, Director of DOE National QIS Research Center - SQMS at Fermilab, Batavia, Illinois, where she leads broad research programs advancing quantum information science and next-generation superconducting systems development.