First, thank you. I knew of the concept that the vacuum states would oscillate differently but I did not know that this effect had a name. It is an interesting effect.Does Unruh radiation imply that in an accelerating frame virtual particles become real or detectable?
Ummmm... Sorry, but there are virtual particles. See this article. (Scroll down to "Feynman diagrams.")1.There is nothing “virtual” in nature. The so called “virtual particle” might be a kind of method of description by some people.
Yes. If the observer is traveling (s)he will notice particles popping up out of the vacuum. The vacuum isn't really empty... it's "filled" with all possible particle fields. Any and all of them would react to the acceleration of the observer to "heat up" a bit, due to the field oscillators apparently having more energy and different particles (not just photons) will be seen to pop out of the vacuum. The effect is predicted but apparently it hasn't been measured so it's status is unknown.Yes I should have said Unruh effect. A similar phenomena is Hawking radiation.
The Unruh effect is often stated as follows: An accelerating observer in empty space will detect particles on a particle detector while an observer in an inertial frame will not.