Circuit Quantum Electrodynamics: Towards Realizing Scalable Quantum Information Processing

The present review attempts to sum up the advancements in circuit quantum electrodynamics (CQED) that has raised our hope for realizing scalable quantum information processing (QIP). Research reveals the advantages of (QIP) over classical information processing in terms of information storage capacity and speed of processing. In this context, the mathematical framework for QIP, like Quantum Fisher Information and computations based on Hilbert space is reviewed. CQED architectures of ever improving configuration are being reported in technical literature. Further, improvements are noticed in coupling strengths between the qubit and the resonator by application of robust protocols. The review highlights the Research efforts and the advancements achieved through faithful quantum state transfer between spatially separated qubits. The important phenomenon of entanglement, deterministic and multipartite, as the cornerstone for scalable QIP is discussed to bring forth the advancements achieved in reducing decoherence and decay. The author sums up the review with a discussion of selected patents and commercial endeavours in the field.