Similarity Transformations of the Lorentz Transformation
  We supplement the Lorentz transform $L(v)$ with a new "Tunneling" transform $T(v)$. Application of this new transform to elementary quantum mechanics offers a novel, intuitive insight into the nature of quantum tunneling; in particular, the so called "Klein Paradox" is discussed. 
Robert Hipple
physics.gen-ph quant-ph