# Natural entanglement system

I'm a beginner and amateur interested in quantum physics.

I would like to know if entangled systems of natural states exist or whether such systems require human intervention?

Is it possible? Either no or yes, Why?

• I am quite sure colors of quarks inside protons must have a wavefunction of the form $\psi_c=|RGB\rangle+|BRG\rangle+|GBR\rangle-|RBG\rangle-|BGR\rangle-|GRB\rangle.$ This is an entangled state (I suppose, better wait the opinion of a particle physicist which could correct me). And protons where not made by humans. – Antonio Ragagnin Jul 11 '14 at 12:47
• Related (somewhat): physics.stackexchange.com/questions/32092/… – Mark Mitchison Aug 10 '14 at 11:12
• 'it exists entanglements systems at natural state' makes no sense, particularly in QM. Nothing exists until it is measured, and even then, it is discussed – user46925 Dec 18 '15 at 4:05