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Quantum Field Theory (QFT) is the theoretical framework describing the quantisation of classical fields which allows a Lorentz-invariant formulation of quantum mechanics. QFT is used both in high energy physics as well as condensed matter physics and closely related to statistical field theory. Use this tag for many-body quantum-mechanical problems and the theory of [tag:particle-physics]. Don’t combine with [tag:quantum-mechanics].

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As I know, from the time consistency of $\Sigma_i$ you will not get another constraint. You have to substitute the Lagrange multiplier in the Hamiltonian by what you got. But I can not understand what …
answered Jan 22 '14 by Vahid
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1answer
What is the topological mass generation mechanism? And what is its relation with the Higgs mechanism? Can we say that after the discovery of Higgs boson, the topological mass generation mechanism i …
asked Oct 23 '13 by Vahid
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0answers
Does anyone has some experience about working with Cadabra and it's (dis)advantage in comparison to other Symbolic Computer Algebra software such as Maple and Mathematica (physics package) in the fiel …
asked Mar 23 '14 by Vahid