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Abstract: The goal of this research project is to study the coherence of central electronic spins found in color impurities in diamond.  In physics,  coherence is used to characterize how long a system can retain its  quantum properties. Solid state defects, such as the nitrogen vacancy (NV) center, have been explored due to their capability to preserve their quantum state for long periods of time. In particular, the NV center stands out due to its unique triplet configuration, and its ability to be optically read out and manipulated at room temperature. Moreover, the NV center interacts with surrounding spins, allowing for full quantum integration in electronic systems. Nonetheless, the phenomena influencing the NV center’s time evolution remain unclear . To gain a better understanding of how spin-bath interactions lead to loss of information within the system, this research project uses quantum mechanical approaches to the central spin problem. Cluster correlation expansion (CCE)  and density functional theory (DFT) are incorporated to model spin dynamics. By relying on computational simulations, data analysis, and literature review, this project seeks to better understand the boundary between macroscopic and microscopic phenomena. Moreover, by evaluating different spin bath configurations, this research will be insightful in the field of quantum information science (QIS) and quantum material development.

Advisor: Geoffroy Hautier

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https://dartmouth.zoom.us/j/94761980054?pwd=2mbpyZSpo3CCn8FM2qYnVUIJwED4vz.1

Meeting ID: 947 6198 0054
Email Physics.Department@dartmouth.edu for passcode