Simple quantum systems as a source of coherent information

Boris A. Grishanin; Victor N. Zadkov

doi:10.1117/12.428350

30 May 2001 Simple quantum systems as a source of coherent information

Boris A. Grishanin, Victor N. Zadkov

Proceedings Volume 4429, International Seminar on Novel Trends in Nonlinear Laser Spectroscopy and High-Precision Measurements in Optics; (2001) https://doi.org/10.1117/12.428350
Event: International Seminar on Novel Trends in Nonlinear Laser Spectroscopy and High-Precision Measurements in Optics, 2000, Vladimir/Suzdal, Russian Federation

Abstract

The coherent information concept is used to analyze a variety of simple quantum systems. Coherent information was calculated for the information decay in a two-level atom in the presence of an external resonant field, for the information exchange between two coupled two-level atoms, and for the information transfer from a two-level atom to another atom and to a photon field. The coherent information is shown to be equal to zero for all full-measurement procedures, but it completely retains its original value for quantum duplication. Transmission of information from one open subsystem to another one in the entire closed system is analyzed to learn quantum information about the forbidden atomic transition via a dipole active transition of the same atom. It is argued that coherent information can be used effectively to quantify the information channels in physical systems where quantum coherence plays an important role.

Citation Download Citation

Boris A. Grishanin and Victor N. Zadkov "Simple quantum systems as a source of coherent information", Proc. SPIE 4429, International Seminar on Novel Trends in Nonlinear Laser Spectroscopy and High-Precision Measurements in Optics, (30 May 2001); https://doi.org/10.1117/12.428350

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