Does zero exist in the energy term?

[SeM]

Hi, did the energy of the universe, right before big bang equal to zero? And if so, does zero as zero-point energy in relativistic theory and quantum mechanics make any sense?

If this is not possible, are there any models, including the standard model, SUSY or QFT which consider ground state or background energy as 0 ?

Thanks

 

[Dale]

The total energy of the universe is not well defined.