Critical Review of Theoretical Models for Anomalous Effects ( Cold Fusion ) in Deuterated Metals

We briefly summarize the reported anomalous effects in deuterated metals at ambient temperature, commonly known as "Cold Fusion" (CF), with an emphasis on important experiments as well as the theoretical basis for the opposition to interpreting them as cold fusion. Then we critically examine more than 25 theoretical models for CF, including unusual nuclear and exotic chemical hypotheses. We conclude that they do not explain the data. 1Lebedev Physical Institute, Russian Academy of Sciences, Russian Federation 2Electric Power Research Institute, and Armor Research, 715 Lakemead Way, Redwood City, CA 94062-3922 3Department of Physics, Purdue University, West Lafayette, IN 47907