Spin Control at Telecom Wavelengths: A Quantum Dot Advance
![The reconstructed trajectory of a ground state hole spin reveals coherent precession, characterized by damped oscillatory behavior in its [latex]S_x[/latex], [latex]S_y[/latex], and [latex]S_z[/latex] components, and a precession plane inclined relative to the conventional [latex]y-z[/latex] plane, indicating complex dynamics within the ground state.](https://arxiv.org/html/2512.20870v1/Section_2/figure_4.png)
Researchers have achieved full quantum-state tomography of a heavy-hole spin within a quantum dot operating in the crucial telecom C-band.
![The reconstructed trajectory of a ground state hole spin reveals coherent precession, characterized by damped oscillatory behavior in its [latex]S_x[/latex], [latex]S_y[/latex], and [latex]S_z[/latex] components, and a precession plane inclined relative to the conventional [latex]y-z[/latex] plane, indicating complex dynamics within the ground state.](https://arxiv.org/html/2512.20870v1/Section_2/figure_4.png)
Researchers have achieved full quantum-state tomography of a heavy-hole spin within a quantum dot operating in the crucial telecom C-band.

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