Vacuum in Quantum Field theory is not empty

In summary, the conversation discusses the concept of vacuum in quantum field theory and the creation of particles from it. There is a distinction between the "bare" vacuum and particles and the "physical" vacuum and particles. The Hamiltonian is expressed in terms of "bare" particles, but can be reformulated in terms of "physical" particles. In this picture, the "physical" vacuum is a no-particle state and particles are created from it. The idea of the vacuum being filled with virtual particles is an artifact of using "bare" particles as a basis in QFT.
  • #36
Nick666 said:
And the points corespond to ?

The ordered triples of real numbers.
 

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