Electron spin coherence in bulk silicon and silicon heterostructures

摘要: Multiple proposals in quantum information science use electron spin qubits in silicon, because of the long relaxation (T 1) and coherence (T 2) times expected. However, this expectation is based on measurements of isolated, tightly bound spins in bulk silicon, whereas spins in realistic architectures will be in a noisier environment, for example in a loosely bound quantum dot or exchange coupled to neighbors, which may shorten the times. This thesis contributes to the field by describing pulsed electron spin resonance (ESR) measurements of the T 1 and T 2 of two spin species which are affected by these environmental noise sources.