Time-dependent correlations in quantum magnets at finite temperature
  In this article we investigate the time dependence of the gap mode of copper nitrate at various temperatures. We combine state-of-the-art theoretical calculations with high precision neutron resonance spin-echo measurements to understand the anomalous decoherence effects found previously in this material. It is shown that the time domain offers a complementary view on this phenomenon, which allows us to directly compare experimental data and theoretical predictions without the need of further intensive data analysis, such as (de)convolution. 
B. Fauseweh, F. Groitl, T. Keller, K. Rolfs, D. A. Tennant, K.   Habicht, G. S. Uhrig
cond-mat.str-el