 
 <prompt> Na QED vacuum or QCD vacuum be the ground state of the Hilbert space? Given di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```For quantum mechanics and quantum field theory, dem define vacuum as di state wey get di lowest energy (wey be di ground state of di Hilbert space). For quantum electrodynamics, dis vacuum dey call 'QED vacuum' to separate am from di vacuum of quantum chromodynamics wey dem dey call QCD vacuum. QED vacuum na state wey no get any matter particles (na im make dem call am so), and e no get photons too. As we don talk before, e no dey possible to achieve dis state for experiment. (Even if all di matter particles fit somehow comot from one place, e no go possible to comot all di blackbody photons.) But, e dey give us beta model for vacuum wey we fit achieve, and e dey agree with plenty experimental observations as we go talk next.``` 