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- W2011740061 abstract "We study the $nu=1/2$ Chern-Simons system and consider a self-consistent field theory of the Singwi-Sjolander type which goes beyond the random phase approximation (RPA). By considering the Heisenberg equation of motion for the longitudinal momentum operator, we are able to show that the zero-frequency density-density response function vanishes linearly in long wavelength limit independent of any approximation. From this analysis, we derive a consistency condition for a decoupling of the equal time density-density and density-momentum correlation functions. By using the Heisenberg equation of motion of the Wigner distribution function with a decoupling of the correlation functions which respects this consistency condition, we calculate the response functions of the $nu=1/2$ system. In our scheme, we get a density-density response function which vanishes linearly in the Coulomb case for zero-frequency in the long wavelength limit. Furthermore, we derive the compressibility, and the Landau energy as well as the Coulomb energy. These energies are in better agreement to numerical and exact results, respectively, than the energies calculated in the RPA." @default.
- W2011740061 created "2016-06-24" @default.
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- W2011740061 date "2001-10-15" @default.
- W2011740061 modified "2023-10-17" @default.
- W2011740061 title "Beyond the random phase approximation in the Singwi-Sjölander theory of the half-filled Landau level" @default.
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- W2011740061 doi "https://doi.org/10.1103/physrevb.64.195307" @default.
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