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Coherent control of electron spins in diamond for quantum information science and quantum sensing

A. Cooper-Roy

Ph.D. thesis, Massachusetts Institute of Technology (2016)

Abstract

This thesis introduces and experimentally demonstrates coherent control techniques to exploit electron spins in diamond for applications in quantum information processing and quantum sensing. Specifically, optically-detected magnetic double resonance measurements are performed on quantum states of single and multiple electron spins associated with nitrogen-vacancy centers and paramagnetic centers in synthetic diamond crystals. The Walsh reconstruction method is introduced as a general framework to estimate the parameters of deterministic and stochastic time-varying fields with quantum sensors. The Walsh method generalizes sampling techniques based on dynamical decoupling sequences and enables measuring the temporal profile of time-varying magnetic fields with increased precision in the presence of noise and environmental fluctuations. Coherent control techniques are further introduced to identify, integrate, and exploit unknown quantum systems located in the environment of a quantum probe. In particular, entangled states of two and three electron spins in diamond are created to estimate the amplitude of time-varying magnetic fields. These results demonstrate a scalable approach to measure time-varying fields with quantum probes in solid-state materials for applications in environment-assisted quantum metrology, such as real-time functional imaging of neural activity at the level of a single neuron, magnetic resonance spectroscopy and imaging of biological complexes in living cells; and characterization of the structure and dynamics of new magnetic materials.

BibTeX

@PhdThesis{CooperRoy16t, author = {Cooper-Roy, Alexandre}, school = {Massachusetts Institute of Technology}, title = {Coherent control of electron spins in diamond for quantum information science and quantum sensing}, year = {2016}, url = {https://dspace.mit.edu/handle/1721.1/111688}, }