Abstract
Stenner et al. reply — It was most natural to present our findings1 in the time domain, although there is an equivalent explanation in the frequency domain if Fourier analysis is used. Nimtz2 uses a frequency-domain argument to assert that our data with gaussian pulses (Fig. 1b in ref. 1) are consistent with the group-velocity approximation, whereas the data we used to measure the information velocity (Fig. 2 in ref. 1) are not; however, we disagree with his analysis.
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References
Stenner, M. D., Gauthier, D. J. & Neifeld, M. A. Nature 425, 695–698 (2003).
Nimtz, G. Nature doi:10.1038/nature02586 (2004)
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Stenner, M., Gauthier, D. & Neifeld, M. Superluminal speed of information? (reply). Nature 429, 40 (2004). https://doi.org/10.1038/nature02587
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DOI: https://doi.org/10.1038/nature02587
