The Bousso bound captures a fundamental relation between quantum information and the geometry of space and time.
It appears to be an imprint of a unified theory that combines quantum mechanics with Einstein's general relativity.
[3] Due to relativistic length contraction, even ordinary thermodynamic systems can be enclosed in an arbitrarily small area.
[4][5] Its central geometric object is a lightsheet, defined as a region traced out by non-expanding light-rays emitted orthogonally from an arbitrary surface B.
[9] A more recent proposal, the quantum focusing conjecture,[10] implies the original Bousso bound and so can be viewed as a stronger version of it.