Quantum physics
makes me so happy.
The Big Bang Theory Season 5, Episode 20
...the Copenhagen interpretation of QUANTUM
physics, he proposed an experiment.
The Big Bang Theory Season 1, Episode 17
And since it's in a QUANTUM state,
it would maintain an infinite persistence.
The Big Bang Theory Season 9, Episode 16
with elementary QUANTUM
mechanical formalism
The Big Bang Theory Season 12, Episode 5