The paper discusses some N Q R / N M R studies performed on Y B a C u O superconductors at the University of Zürich. In particular, we review studies performed in Y 2 B a 4 C u 7 0 1 5 by measuring various planar Cu N Q R / N M R parameters: the spin-lattice relaxation time, the Knight shift and the indirect component of the Gaussian contr ibution to the spin-spin relaxation time. The temperatu...

We investigate quantum aspects of Gopakumar-Minwalla-Strominger (GMS) solutions of noncommutative field theory (NCFT) at large noncommutativity limit, θ → ∞. Building up quantitative Weyl-Moyal map between operator formulation of 2-, respectively, (2+1)-dimensional NCFTs and large N matrix models of c = 0, respectively, c = 1 noncritical strings, we show that GMS solutions are quantum mechanica...