Recent content by aspidistra

Un...I am sorry Eugene, my english is not good. I try my best to clarify my question. The authors said: "we can generate a description of the system at time zero with respect to a second reference frame translated an amount t in time by letting F represent the state of the system in the second...

After reading few pages of this paper, I got stuck. Before posting my question, let me summarize the common abstract mathematical structure described in section 2 of this paper for both classical and quantum mechanics. 1) Let R be a real inear space with lie braket define on it ie. R is a...

So...Is that means since in real world particles can be created and annihilated, and a field theory can describe a such process a point like particle model can not, therefore a project which use point like particle quantization scheme is dead?

Dear all, Since standard QM textbook Sakurai or Shankar only mention Non-relativistic path integral and QFT text deal with path integral for field theory, I want to ask whether there is a subject like "Path Intergral quantization for Relativistic point like Particles"? If so, is this subject...

software to calculate simple commutator relation ?? Dear All: I have hundred terms of commutators needs to be calculate. Each one looks like [{\epsilon_{i m}}^n\eta^m\frac{\partial}{\partial\eta^n},C\eta_j\eta^l\frac{\partial}{\partial\theta^l}] ,where C is function of \theta^i and...