Physics – Classical Physics
Scientific paper
2010-11-05
Physics
Classical Physics
20 pages
Scientific paper
A relativistic classical field theory with zero-point radiation involves a vacuum corresponding to a scale-invariant spectrum of random classical radiation in spacetime with the overall constant chosen to give an energy (1/2)\hbar\omega per normal mode in inertial frames. Classical field theory with classical zero-point radiation gives the same field correlation functions as quantum field theory for the symmetrized products of the corresponding free massless fields in inertial frames; however, the interpretations in classical and quantum theories are quite different. Quantum field theory has photons in thermal radiation but not in the vacuum state; classical theory has radiation in both situations. The contrast in interpretations is most striking for the Rindler coordinate frame accelerating through zero-point radiation; classical theory continues tensor behavior over to the Rindler frame, whereas quantum theory introduces a new Rindler vacuum state. The classical interpretation of thermal behavior rests on two fundamental principles. i) A scale-invariant distribution of random radiation cannot correspond to thermal radiation at non-zero temperature. ii) A scale-invariant distribution of random radiation can acquire a correlation time which reflects the parameters of a spacetime trajectory through the scale-invariant radiation. Based on these principles, classical theory finds no basis for an accelerating observer to reinterpret zero-point radiation in terms of thermal radiation. In contrast, quantum field theory claims that an observer uniformly accelerated through zero-point flucturations of the Minkowski vacuum encounters a thermal bath at the temperature T=\hbar a/(2\pi ck).
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