The Unruh effect, which Unruh discovered in 1976, is the prediction that an accelerating observer will observe black-body radiation where an inertial observer would observe none. In other words, the accelerating observer will find herself in a warm background. The quantum state which is seen as ground state for observers in inertial systems is seen as a thermodynamic equilibrium for the uniformly accelerated observer. The Unruh effect therefore means that the very notion of vacuum depends on the path of the observer through spacetime.I don't know that I'm related to Bill Unruh... or Doktor Kurt Unruh von Steinplatz for that matter.
Wednesday, 4 October 2006
Unruh effect - Wikipedia, the free encyclopedia