
Specifically, QUANTUM field theory
in D-dimensional de Sitter space.
The Big Bang Theory Season 4, Episode 23

What about loop QUANTUM gravity?
The Big Bang Theory Season 7, Episode 20

and its QUANTUM efficiency
is off the charts.
The Big Bang Theory Season 12, Episode 7

And since it's in a QUANTUM state,
it would maintain an infinite persistence.
The Big Bang Theory Season 9, Episode 16