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quant-ph2013
Second quantization and gauge invariance
Dan Solomon
It is well known that the single particle Dirac equation is gauge invariant. This means that observable quantities, such as the current density, are not affected by a gauge transfo…
quant-ph2013
A demonstration of the necessity of regularization in order to avoid inconsistent results in quantum field theory
Dan Solomon
We will examine a particular mathematical derivation in a paper by P. Falkensteiner and H. Grosse (F&G) [1]. In [1] a quantity "delta(A)" is defined. This quantity is generated whe…