- Ohalo College, P.O.Box 222, Qazrin, 12900, IsraelReprint requests to G.B. F.; E-mail: email@example.comZ. Naturforsch. 62a, 620–626 (2007); received May 21, 2007The process of ampliﬁcation of a single spin state using nuclear magnetic resonance (NMR) tech-niques in a rotating frame is considered. Our main aim is to investigate the efﬁciency of variousschemes forquantum detection.Resultsof numericalsimulation ofthetimedependence ofindividualand total nuclear polarizations for 1D, 2D, and 3D conﬁgurations of the spin systems are presented.