%0 Journal Article %T On the underlying theory approach for quantum theories %A Jifeng Yang %J Physics %D 1998 %I arXiv %X Some explanations and implications of the underlying theory approach for quantum theories (QM or QFT) are discussed and suggested. This simple idea seems to have significantly nontrivial effects for our understanding of the quantum theories. %U http://arxiv.org/abs/hep-th/9808047v1