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Journal Article

Coherent control of collective nuclear quantum states via transient magnons


Meier,  G.
Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging;

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Bocklage, L., Gollwitzer, J., Strohm, C., Adolff, C. F., Schlage, K., Sergeev, I., et al. (2021). Coherent control of collective nuclear quantum states via transient magnons. Science Advances, 7(5): eabc3991. doi:10.1126/sciadv.abc3991.

Cite as: http://hdl.handle.net/21.11116/0000-0007-DC17-8
Ultrafast and precise control of quantum systems at x-ray energies involves photons with oscillation periods below 1 as. Coherent dynamic control of quantum systems at these energies is one of the major challenges in hard x-ray quantum optics. Here, we demonstrate that the phase of a quantum system embedded in a solid can be coherently controlled via a quasi-particle with subattosecond accuracy. In particular, we tune the quantum phase of a collectively excited nuclear state via transient magnons with a precision of 1 zs and a timing stability below 50 ys. These small temporal shifts are monitored interferometrically via quantum beats between different hyperfine-split levels. The experiment demonstrates zeptosecond interferometry and shows that transient quasi-particles enable accurate control of quantum systems embedded in condensed matter environments.