I was thinking if you entangled both the electron and positron in a states that both of thier orbitals don't interact. Or just entangle the electron with a helium higher orbital electron. Or you entangled a muon with a helium proton(is that even possible?). Is there any way to keep a particle from reaching its ground state? Can you lower a quarks mass? Can you entangled the electron with a positron? Can a particle observe another particle? Can positrons be entangled with protons? Can other particles give a muon enough energy to stay at its metastable 2s? Can a neutron stablize a lepton? Can are there any other stable particles other than protons,electrons,neutrons, neutrinos and photons? Can you stablize a particle? Are any hyperonic atoms stable?