problem through the principle of equivalence.: 137–149  The equivalence principle states that in any sufficiently small region of space, the effects of gravitation...

known as the weak equivalence principle, or the universal equality of inertial and passive-gravitational mass): the trajectory of a test body in free fall...

Quantum gravity (QG) is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics. It deals with environments...

simple consequence of the Einstein equivalence principle and was predicted by Einstein in 1907. As such, it is not a test of general relativity in the same...

Space-Time Explorer and Quantum Equivalence Principle Space Test (STE-QUEST) was a proposed satellite mission to test the Einstein Equivalence Principle...

other) they perform?" The principle of computational equivalence (PCE) has been criticized for being vague, unmathematical, and for not making directly...

equilibrium (defined below), and is used to derive the properties of thermodynamic systems from the laws of classical or quantum mechanics. The ensemble formalises...

achieve apparent faster-than-light travel by contracting space in front of it and expanding space behind it, under the assumption that a configurable energy-density...

known as the participatory anthropic principle, articulated by John Archibald Wheeler, suggests on the basis of quantum mechanics that the universe, as a...

with the equivalence principle. Subsequently, other physicists, most notably Thanu Padmanabhan, began to explore links between gravity and entropy. In...