Phase Fluctuations and Squeezing |
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| Authors: | John A. Vaccaro Stephen M. Barnett D.T. Pegg |
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| Affiliation: | 1. Division of Commerce and Administration , Griffith University , Nathan, Brisbane, 4111, Australia;2. Division of Science and Technology , Griffith University , Nathan, Brisbane, 4111, Australia;3. Department of Physics and Applied Physics , University of Strathclyde , John Anderson Building, 107 Rottenrow, Glasgow, G4 ONG, Scotland;4. Division of Science and Technology , Griffith University , Nathan, Brisbane, 4111, Australia |
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| Abstract: | Abstract We investigate the relationship between squeezing and reduced phase fluctuations for various states of the single-mode electromagnetic field, including the strongly-squeezed vacuum and phase states. We find that, although squeezing the fluctuations of the electric field that arise from the vacuum guarantees a more well-defined phase, reducing phase fluctuations does not guarantee a squeezed electric field. We also investigate the evolution of the electric field and its fluctuations for a phase state. Our results show that even though the electric field fluctuations never vanish for a phase state, the times when the electric field changes sign are precisely defined. We also discuss why it is not always possible to attribute physical properties to certain states, such as simple superpositions of phase states. |
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