2D Matter-Wave Stern-Gerlach Interferometer with Rotational Dynamics and NV-Spin Contrast

First study of 2D Stern-Gerlach interferometry with NV-diamond nanorotor: gyroscopic spin via ~10 kHz rotation stabilizes Euler-angle dynamics, achieving ~0.215µm superposition in 0.013s with contrast ~0.996 for 10⁻¹⁶kg particles.

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