For the past year I have worked in Petta Group with Sorawis Sangtawesin and Seth Perlman studying spin control of Nitrogen Vacancy (NV) Centers in diamonds, with particular interest in their applications in Quantum Computing. My goal for this year was to build a two-qubit register that can be operated using single-shot readout. In an effort to achieve this, over the summer I developed a recipe for fabricating Solid Immersion Lenses (SILs) on diamonds, which will increase our collection efficiency enough to perform single-shot readout. Effectively, by using a Focused Ion Beam Microscope, I was able to shape the surface of the diamond over an NV center into a small (several micron) hemisphere. This makes the path of any photons emitted by the NV Center normal to the surface of the diamond, allowing us to collect photons that would have otherwise been reflected due to the low angle of total internal refraction in diamond. Now that I can fabricate samples that give us a higher collection efficiency, we can use other tools we have developed in the past year, observing Zeeman splitting, Rabi Oscillations, Optically Detected Spin Resonance, etc., to make a two-qubit register in the near future.
This summer I worked in Professor Bill Jones's cosmology lab. I had a lab project and an analysis project. My lab project involved designing and compactifying a low-power circuit for a pressure sensor so that it can read the pressure of gas entering and exiting a cryostat. My analysis project involved simplifying a model of solar system dust so that computers could more efficiently fit the model's parameters to data acquired from the CMB foreground.