Kai Fauth

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Questions related from Kai Fauth

Does it make sense to ask for the duration of a light scattering event?

Suppose a photon with wavevector k is being elastically scattered from, say, an atom into a state with different wavevector q, does it make sense to ponder the (average) duration of such an...

11 December 2018 5,550 6 View

How to adequately interpret "nonthermal" occupations of (crystal field) excited states in the (NCA treatment of the) Kondo impurity?

My question concerns the interpretation of occupation numbers in the Kondo problem in presence of crystal fields. (1) Consider first a Ce4f electron in a hexagonal crystal field (CF) without Kondo...

09 February 2016 7,703 1 View

Is the data in Fig.5 of this paper obtained as the response to an external stimulus of given frequency?

In this publication (caption to Fig.5) you state that the sheer existence of (electromagetic) resonances in metallic cavities disproves the idea of such cavities containing black body radiation in...

24 April 2014 1,414 3 View

On the notion of a 'van Vleck ion'

My first understanding of 'van Vleck paramagnetism' refers to open shell configurations short of half filling by one electron. In LS coupling we then have L=S and by the third Hund's rule we...

11 April 2013 4,054 5 View