Einstein's Principle Of Equivalence Research Articles

Unruh acceleration radiation revisited

When ground-state atoms are accelerated and the field with which they interact is in its normal vacuum state, the atoms detect Unruh radiation. We show that atoms falling into a black hole emit acceleration radiation which, under appropriate initial conditions (Boulware vacuum), has an energy spectrum which looks much like Hawking radiation. This analysis also provides insight into the Einstein principle of equivalence between acceleration and gravity. The Unruh temperature can also be obtained by using the Kubo–Martin–Schwinger (KMS) periodicity of the two-point thermal correlation function, for a system undergoing uniform acceleration; as with much of the material in this paper, this known result is obtained with a twist.

Quantum optics approach to radiation from atoms falling into a black hole

We show that atoms falling into a black hole (BH) emit acceleration radiation which, under appropriate initial conditions, looks to a distant observer much like (but is different from) Hawking BH radiation. In particular, we find the entropy of the acceleration radiation via a simple laser-like analysis. We call this entropy horizon brightened acceleration radiation (HBAR) entropy to distinguish it from the BH entropy of Bekenstein and Hawking. This analysis also provides insight into the Einstein principle of equivalence between acceleration and gravity.

Misunderstandings Related to Einstein's Principle of Equivalence and Einstein's Theoretical Errors on Measurements.

Misunderstandings Related to Einstein's Principle of Equivalence and Einstein's Theoretical Errors on Measurements.

Quantum mechanical effects in non-inertial systems

An investigation is made into the possible quantum mechanical effects due to the inertial force effect in the non-inertial systems, e.g. in atoms and molecules moving with high acceleration. In accordance with Einstein's principle of equivalence similar effects should appear in the sufficiently strong permanent gravitational fields.

The Principle of Equivalence, electrodynamics and General Relativity

It is shown that the customary covariant formulation of electrodynamics in General Relativity is incompatible with the Einstein Principle of Equivalence. This is demonstrated for the case of a resistanceless current-carrying wire in a static spherically symmetric gravitational field—where the Einstein Principle of Equivalence implies the existence, in the vicinity of the wire, of a non-zero component of the electric field parallel to the wire, whereas the covariant form of Maxwell's equations does not. An experiment, involving a superconducting current-carrying wire segment placed in the Earth's gravitational field, is suggested. Whether or not a component of electric field parallel to the wire, at a point in the wire's vicinity, would be detected would resolve the issue.