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- W2112317070 abstract "We investigate the many-body properties of a two-dimensional electron gas constrained to the surface of a sphere, a system which is physically realized in multielectron bubbles in liquid helium. A second-quantization formalism, suited for the treatment of a spherical two-dimensional electron gas (S2DEG), is introduced. Within this formalism, the dielectric response properties of the S2DEG are derived, and we identify both collective excitations and a spectrum of single-particle excitations. We find that the single-particle excitations are constrained to a well-defined region in the angular momentum - energy plane. The collective excitations differ in two important aspects from those of a flat 2DEG: on a sphere, the 'spherical plasmons' have a discrete frequency spectrum and the lowest frequency is nonzero." @default.
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- W2112317070 date "2002-05-08" @default.
- W2112317070 modified "2023-09-26" @default.
- W2112317070 title "Many-body properties of a spherical two-dimensional electron gas" @default.
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- W2112317070 doi "https://doi.org/10.1103/physrevb.65.195418" @default.
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