Magnetic Resonance: Spin Qubits and Their Applications

This lecture introduces the principles of magnetic resonance and its application to spin qubits. It begins with an overview of quantum science, focusing on magnetic resonance and the behavior of spin qubits. The instructor explains the concept of magnetic moments and energy states, detailing how spins interact with magnetic fields. The lecture covers the equilibrium state of spins, Larmor precession, and relaxation processes. The instructor discusses the techniques used in magnetic resonance spectroscopy, including excitation and detection methods. The importance of Rabi oscillations and free induction decay (FID) in measuring spin states is emphasized. The lecture also explores the relationship between relaxation times (T1 and T2) and decoherence in spin systems. The application of these principles in nuclear magnetic resonance (NMR) and medical imaging (MRI) is highlighted, showcasing the relevance of spin qubits in modern quantum technologies. The session concludes with a discussion on the construction of quantum boxes for electron spin qubits, emphasizing the integration of quantum mechanics with electronic engineering.