# Eigenmodes in the long-time behavior of a coupled spin system measured with nuclear magnetic resonance.

@article{Meier2011EigenmodesIT, title={Eigenmodes in the long-time behavior of a coupled spin system measured with nuclear magnetic resonance.}, author={Benno Meier and Jonas Kohlrautz and J{\"u}rgen Haase}, journal={Physical review letters}, year={2011}, volume={108 17}, pages={ 177602 } }

The many-body quantum dynamics of dipolar coupled nuclear spins I=1/2 on an otherwise isolated cubic lattice are studied with nuclear magnetic resonance. By increasing the signal-to-noise ratio by 2 orders of magnitude compared with previous reports for the free induction decay (FID) of (19)F in CaF(2) we obtain new insight into its long-time behavior. We confirm that the tail of the FID is an exponentially decaying cosine, but our measurements reveal a second decay mode with comparable…

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