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Relative phase for a quantum field interacting with a two-level system
Author(s) -
Alfredo Luis,
L. L. Sánchez-Soto
Publication year - 1997
Publication title -
physical review a
Language(s) - English
Resource type - Journals
eISSN - 1094-1622
pISSN - 1050-2947
DOI - 10.1103/physreva.56.994
Subject(s) - physics , rotation formalisms in three dimensions , operator (biology) , dipole , field (mathematics) , relative phase , phase (matter) , quantum , quantum mechanics , polar , electromagnetic field , quantum electrodynamics , pure mathematics , biochemistry , chemistry , geometry , mathematics , repressor , transcription factor , gene
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

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