98 research outputs found
Coherent control of collective nuclear quantum states via transient magnons
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
Studien über die gebräuchlichsten Methoden zum Nachweis von Störungen des Säure-Basen-Haushaltes
Beziehungen zwischen arterieller Sauerstoffsättigung, Sauerstoffsättigung im Sinus coronarius und Sauerstoffausnutzung im Myokard unter Berücksichtigung von Sauerstoffkapazität und arteriellem Druck
Dynamics of cardiac activity and the p wave of the electrocardiogram with stimulation of the vagus following disruption of the inhibitory effect
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