– The dependence of the transition temperature Tg in terms of the concentration of magnetic impurities c in spin glasses is explained on the basis of a screened RKKY interaction. The two observed power laws, Tg ∼ c at low c and Tg ∼ c 2/3 for intermediate c, are described in a unified approach. Metallic spin glasses such as Cu1−cMnc, Ag1−cMnc, Au1−cFec are alloys formed by magnetic impurities e...

Dressed states forming when quantum emitters or atoms couple to a photonic bath underpin number of phenomena and applications, in particular dispersive effective interactions occurring within bandgaps. Here, we present compact formulation the resolvent-based theory for calculating atom-photon dressed built on idea that atom behaves as an impurity. This establishes explicit connection with stand...