IS THE MILNE COORDINATE SYSTEM A GOOD ONE?
- 10 January 1994
- journal article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters A
- Vol. 9 (1) , 19-27
- https://doi.org/10.1142/s0217732394000046
Abstract
The upper and lower quadrants of flat space-time can be described using the Milne coordinate system. The Klein-Gordon equation of a scalar field in such a coordinate system admits at least two sets of solutions. Based on the Feynman propagator behavior it is shown that only one of the two sets gives the conventional interpretation of quantum field theory, based on a Fock space. Therefore, discarding the other set, one can still keep the Milne coordinate system.Keywords
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