
What about loop quantum GRAVITY?
The Big Bang Theory Season 7, Episode 20

...for this university's
six-loop quantum GRAVITY calculations.
The Big Bang Theory Season 6, Episode 9

The idea that you might be able
to incorporate GRAVITY...
The Big Bang Theory Season 2, Episode 6

...who believes loop quantum GRAVITY
better unites quantum mechanics...
The Big Bang Theory Season 2, Episode 2

...she's unjustifiably arrogant
about loop quantum GRAVITY...
The Big Bang Theory Season 2, Episode 2