%0 Journal Article
%A Luis Aina, Alfredo
%A Sánchez Soto, Luis Lorenzo
%T Relative phase for a quantum field interacting with a two-level system
%D 1997
%@ 1050-2947
%U https://hdl.handle.net/20.500.14352/59709
%X Several quantum descriptions of the relative phase between an atomic dipole and a one-mode electromagnetic field are examined. Positive-operator measures for this variable are derived from dipole and field-phase formalisms. They are analyzed and compared with an operator defined by a polar decomposition. Some examples of time evolution are discussed.
%~