VARIATIONAL APPROACH TO THE GROUND STATE OF THE TWO-DIMENSIONAL ELECTRON GAS.

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Maldaque, Pierre F.
Nicholson, Donald M.
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Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics | 1979年 / 99卷 / 1-4期
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A variational upper bound for the ground-state energy of the two-dimensional electron gas is calculated shedding light on the validity of approximate calculations and indicates that the ″deformable jellium″ model of an ideal two-dimensional electron gas may exhibit a CDW instability for r//s greater than about 2. The original feature of the calculation is that some correlation effects are included in the variational bound by means of a ″geminal″ expansion of the many-body wave function.
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页码：250 / 254
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