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QI: Fachverband Quanteninformation

QI 11: Semiconductor Spin Qubits II: Si, Ge, and Color Centers

QI 11.4: Vortrag

Dienstag, 11. März 2025, 12:00–12:15, HS II

Characterization of NV implanted diamond for NV dipolar coupled pairs — •Annarita Ricci and Rebekka Eberle — Fraunhofer Institute for Applied Solid State Physics, Tullastr. 72 , 79108, Freiburg im Breisgau

Recent advancement on the fabrication of diamond and the high precision control on single ion implantation techniques have opened new paths in the study of NV dipolar coupled pairs. Th magnetic interaction between the electron spins of two near-by NV centers is highly influenced by their relative spatial arrangement and orientation of the spins. Thus, in this research we focus on the characterization of different NV pairs systems in a sample variation. First, we show the magnetic resonance of NV-NV spin pairs and the quantification of the dipolar coupling strength. The coherence time is then measured by employing the Spin Echo protocol and Dynamical Decoupling techniques (DD). Furthermore, we analyze the coherent sources of errors, and an estimation of the best parameters to use is given, to optimize the control of the system. The finding contributes to a deeper understanding of NV centers pairs in diamond and their potential for advancing and scaling quantum technology.

Keywords: NV dipolar coupling; Characterization; NV qubit; Diamond Technology