TV series example of the word

The Big Bang Theory Season 1, Episode 1
Yeah, well, it's just some quantum mechanics...

The Big Bang Theory Season 1, Episode 5
Look at the beta function of quantum chromodynamics.

The Big Bang Theory Season 10, Episode 20
that the brain itself is in two different quantum states,

The Big Bang Theory Season 10, Episode 11
Sheldon, Howard, and I are working with the government on our quantum gyroscope.

The Big Bang Theory Season 8, Episode 2
How would you determine the ground state of a quantum system with no exact solution?