Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 63: Poster – Quantum Information (joint session QI/Q)

Q 63.50: Poster

Thursday, March 13, 2025, 17:00–19:00, Tent

Modeling spin initialization in highly strained silicon-vacancy centers — •Michael Gstaltmeyr, Marco Klotz, Andreas Tangemann, and Alexander Kubanek — Institute for Quantum Optics, University Ulm, Germany

Spin qubits in solid state hosts are, due to their promise of scalability, candidates for the realization of quantum networks. The good spin properties of diamond paired with the optical properties of group-IV defects make them of special interest. We are using highly strained Silicon-Vacancy centers in nanodiamonds to mitigate phonon induced electron spin dephasing at liquid helium temperature. However, high strain introduces challenges in optical spin initialization, as additional transitions closely interact with the initialization pathway, complicating the traditional three-level pump model. This work explores these interactions and proposes improved methods to characterize the system.

Keywords: Group IV Defect Centers; Spin Control; Diamond; Quantum Information