Our research in quantum control and sensing encompasses a broad range of projects aimed at advancing the precision and applicability of quantum technologies. By leveraging quantum defects such as NV centers in diamond, we investigate spin systems at the atomic scale, developing tools and methodologies to probe and manipulate their quantum states. From exploring the intricate dynamics of nuclear quadrupolar resonance to innovating protocols for quantum state initialization and control, our work addresses fundamental challenges and opens new avenues for sensing applications. These efforts are designed to bridge the gap between experimental capabilities and practical applications, enabling breakthroughs in areas like material science, chemistry, and biotechnology.
Across multiple projects, we focus on utilizing quantum control techniques for high-sensitivity sensing of local fields and structural dynamics. This includes characterizing nuclear and electronic spin interactions, resolving molecule-to-molecule variations, and investigating the effects of strain and electric fields on quantum systems. Beyond the single-molecule scale, we explore the integration of quantum sensors in complex environments, such as biochemical solutions, for in situ measurements. Together, our work in quantum sensing and control contributes to a deeper understanding of quantum systems while laying the groundwork for transformative applications in science and technology.
This paper presents emulsion-coated nanodiamonds that retain quantum properties, improve stability, and enable versatile chemical conjugations for quantum sensing and nanomedicine.
The paper uses NV centers for single-nucleus quadrupolar resonance spectroscopy, revealing symmetry-breaking terms for quantum sensing.
[1] Ouellet, M., Joseph Minnella, Lee C. Bassett. A graph-based representation of quantum dynamics and control. (2024) (In preparation)
[2] Breitweiser, S.A*., Ouellet, M.*, Huang, T.Y., Taminiau, T.H. and Bassett, L.C., 2024. Quadrupolar resonance spectroscopy of individual nuclei using a room-temperature quantum sensor. arXiv preprint arXiv:2405.14859.
[3] Shulevitz, H.J., Amirshaghaghi, A., Ouellet, M., Brustoloni, C., Yang, S., Ng, J.J., Huang, T.Y., Jishkariani, D., Murray, C.B., Tsourkas, A. and Kagan, C.R., 2024. Nanodiamond emulsions for enhanced quantum sensing and click-chemistry conjugation. ACS Applied Nano Materials, 7(13), pp.15334-15343.
[4] Poteshman, A.N., Ouellet, M., Bassett, L.C. and Bassett, D.S., 2023. Network structure and dynamics of effective models of nonequilibrium quantum transport. Physical Review Research, 5(2), p.023125.
[5] Ouellet, M. and Tremblay, S., 2020. Supersymmetric generalized power functions. Journal of Mathematical Physics, 61(7).
The tiny sensor, the true star of the show.