Rare Isotope-Containing Diamond Color Centers for Fundamental Symmetry Tests

• URL: http://arxiv.org/abs/2305.05781v1
• Date: Tue, 9 May 2023 22:01:38 GMT
• Title: Rare Isotope-Containing Diamond Color Centers for Fundamental Symmetry Tests
• Authors: Ian M. Morris, Kai Klink, Jaideep T. Singh, Jose L. Mendoza-Cortes, Shannon S. Nicley, Jonas N. Becker
• Abstract summary: We study the formation, structure, and electronic properties of crystal defects in diamond containing $229$Pa. Our findings hold promise for the existence of such defects and can contribute to the development of a quantum information processing-inspired toolbox of techniques for studying rare isotopes.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Detecting a non-zero electric dipole moment (EDM) in a particle would unambiguously signify physics beyond the Standard Model. A potential pathway towards this is the detection of a nuclear Schiff moment, the magnitude of which is enhanced by the presence of nuclear octupole deformation. However, due to the low production rate of isotopes featuring such "pear-shaped" nuclei, capturing, detecting, and manipulating them efficiently is a crucial prerequisite. Incorporating them into synthetic diamond optical crystals can produce defects with defined, molecule-like structures and isolated electronic states within the diamond band gap, increasing capture efficiency, enabling repeated probing of even a single atom, and producing narrow optical linewidths. In this study, we used density functional theory (DFT) to investigate the formation, structure, and electronic properties of crystal defects in diamond containing $^{229}$Pa, a rare isotope that is predicted to have an exceptionally strong nuclear octupole deformation. In addition, we identified and studied stable lanthanide-containing defects with similar electronic structures as non-radioactive proxies to aid in experimental methods. Our findings hold promise for the existence of such defects and can contribute to the development of a quantum information processing-inspired toolbox of techniques for studying rare isotopes.

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