In QFT equations, there are not only positive energy solutions, but negative ones as well.(adsbygoogle = window.adsbygoogle || []).push({});

Dirac had the hole theory. But the sea may have infinite charges and gravity effects.

And then QFT textbooks just explain the negative solution as anti-particle.

But in the lab, we measure the energies of particle and anti-particle.

Both have positive energies.

So my question is, how to explain that

anti-particle has negative energy eigen value,

but in lab observed positive energy?

If anti-matter had negative energy,

particle-antiparticle annihilation

will cancel each other's energies out

as Energy+(-Energy)=0.

But in fact we observed Energy+Energy=2 Energy(of gamma).

Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# How negative energy solution has positive energy in lab?

**Physics Forums | Science Articles, Homework Help, Discussion**