# Should one talk about THE Quantumfield

I studied QED and QCD and I know that there is an vacuum state for each theory $|{0}\rangle_{QED}, |{0}\rangle_{QCD}$ where we describe the particles as excitations of that vacuum state. But can we also say that this state is our quantum field and further is there one single vacuum state for the Standardmodel theory?

In other words: Does it makes sense if we talk about the one and only quantum field and all interactions and particle creations and anihilations are only excitations of this field?

• If you studied QED/QCD you should know that there is more than one field (quantum or not) in those theories. The vacuum state is wholly different from being a field and I'm puzzled why you would try to say that this state "is our quantum field". Apr 15 '17 at 14:49
• @ACuriousMind You can $\oplus$ together all the fields to treat them as one big field. Also, there's only one vacuum state rather than one for each field. Maybe that's what StrangeField is saying? Apr 15 '17 at 15:59
• I shouldn't better wrote something else as "the one quantum field" of course there are many fields. The question was more of the kind: Can I say that all fields causes excitations (particles) of something (not sure if this is our ground state)? Apr 15 '17 at 18:39