Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1998-07-06
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 1 figure
Scientific paper
It is argued that the Girvin, MacDonald and Platzman (GMP) evaluation of the magneto-roton spectrum, in spite of probably being a sensible estimate of the excitation spectrum around the real ground state, is not implying the variational stability of the Laughlin state. The suplementary corrections needed to produce a variational calculation around the Laughlin state at 1/3 value of the filling factor are evaluated approximately. The results indicate, within the considered approximation, the existence of lower lying states for a range of wavevector values.
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