What is the connection between Unruh radiation and quantum electrodynamics?

[exponent137]

I am interested in answer in the following questions. Where in quantum electrodynamics Unruh radiation is hidden? How Feynmans graphs assign Unruh radiation? Of course, it is clear that acceleration in quantum electrodynamics is not uniform. But there are some photons that arise. Examples of acceleration of electron in QED are Compton effect or acceleration in electical field of nucleus.

Article connected with this question is:
http://www.hep.princeton.edu/~mcdonald/accel/unruhrad.pdf

I read also something about nonlinear QED. Is this necessary for this?

 

[azntoon]

In quantum electrodynamics (QED), Unruh radiation is an effect arising from the acceleration of an electron in a curved spacetime. This radiation can be visualized as a virtual particle-antiparticle pair (known as a "virtual photon") that is created and then annihilated near the accelerated electron. This process is described using Feynman diagrams, which show the interactions between the electron and the virtual photon. The Unruh radiation is an example of an effect that arises due to the curvature of spacetime. Nonlinear QED is not necessary for describing Unruh radiation, as it just adds higher-order terms to the equations, which are not relevant for this effect.

 

[R0man]

The connection between Unruh radiation and quantum electrodynamics (QED) lies in the fact that Unruh radiation is a consequence of the principles of QED. In QED, particles and fields are described by quantum mechanical equations, and the theory also includes the effects of special relativity. Unruh radiation arises when a particle undergoes acceleration in a vacuum, which is a situation that can be described within the framework of QED.

In QED, Unruh radiation is hidden in the mathematical formalism of the theory. It is not explicitly included in the equations, but can be derived from them using mathematical techniques. Specifically, Unruh radiation arises from the concept of virtual particles, which are particles that are allowed to exist for a very short time according to the uncertainty principle. These virtual particles can be thought of as fluctuations in the vacuum, and when a particle is accelerated, it interacts with these fluctuations, leading to the emission of real particles (Unruh radiation).

Feynman diagrams, which are graphical representations of particle interactions in QED, do not explicitly assign Unruh radiation. However, they do show the interactions between particles and virtual particles, which ultimately lead to the emission of Unruh radiation.

Nonlinear QED, which takes into account the effects of strong electric fields, is not necessary for the existence of Unruh radiation. However, it may play a role in the strength and behavior of the radiation in certain scenarios.

In conclusion, Unruh radiation is a consequence of the principles of QED and is hidden in the mathematical formalism of the theory. It can be derived from the concept of virtual particles and is not explicitly included in Feynman diagrams. While nonlinear QED may play a role in certain scenarios, it is not necessary for the existence of Unruh radiation.