The world appears causal in the sense that the result of a measurement may depend on the past history of the observed system, but not on what the experimenter will do with the system after the measurement. This raises the question whether noncausality at a macroscopic level would necessarily lead to an “unreasonable” world. The study of a model world with axiomatically well-specified properties shows that noncausal systems can be discussed in a logically consistent manner so that noncausality might well (...) exist in the real world as a weak, but so far overlooked, effect. (shrink)

Eugene Wigner and others have speculated that the “collapse of the state vector” during an observation might be a physically real process so that some modification of current quantum theory would be required to describe the interaction with a conscious observer appropriately.Experimental reports on the “psychokinetic effect” as a mental influence on the outcome of quantum jumps suggest that perhaps this effect might be vital for an understanding of the observer's role in quantum mechanics.Combining these two speculations we introduce a (...) reduction principle that provides for the gradual reduction of a macroscopically ambiguous state and allows simultaneously for the occurrence of some psychokinetic effect in the process of observation.The resulting model leads to many of the paradoxical, but logically consistent, features of the psychokinetic effect that have been reported, and makes further testable predictions.The model does not touch on the more profound questions of consciousness. But the model implies that the result of a conscious observation, the collapse of the state vector, becomes accessible to the experimenter, with the psychokinetic effect as probe: Whether Schrödinger's cat has not or has collapsed the state vector determines whether or not the later human observer can still exert a psychokinetic influence on the result. (shrink)

"Immer wieder hat sich Helmut Schmidt mit dem Verhältnis von Religion und Politik beschäftigt. Seine wichtigsten Beiträge zu dieser hochaktuellen Frage hat er für das vorliegende Buch zusammengestellt und durch ein abschliessendes Kapitel ergänzt. In jeder Zeile wird deutlich: Schmidt sorgt sich um die Gefährdung des Weltfriedens durch den um sich greifenden Missbrauch der Religion für politische Zwecke. Eindringlich appelliert er an die Führer der Weltreligionen, ihrer Verantwortung für den Frieden gerecht zu werden"--Publisher's description, p. [4] of dust jacket.