Like gravity, electromagnetism, the weak interaction or the srong interaction? The quantum vacuum is in all physics fields, for example, we have: - QCD vacuum - QED Vacuum - False vacuum decay - Vacuum permeability, permittivity and polarization - Vacuum zero state - Vacuum fluctuations - Some talk about the vacuum to explain cosmic inflation, subatomic particles speed, its energy, bla, bla... You can add more vacuums!