I am confused about the definition of ground state and its characteristics. For a field in spacetime do we mean the ground state to be the minimum of the potential or minimum of the total energy? Specifically what is the momentum four vector of the ground state ([tex] p^{\mu}=(...) [/tex]) for a massive and for a massless field? In my opinion, for massless case, [tex] p^{\mu}=(0,0,0,0) [/tex] and for massive case, [tex] p^{\mu}=(m,0,0,0) [/tex] . Is that correct? How does the potential [tex] V(x) [/tex] enter in the four momentum? In my expression for the four momentum, I have not included the potential in the four momentum.(adsbygoogle = window.adsbygoogle || []).push({});

Finally what is the momentum four vector for a supersymmetric ground state?

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# Momentum four vector for ground state.

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