Comments on "Translation-invariant bipolarons and the problem of high-temperature superconductivity"

Details Comments on "Translation-invariant bipolarons and the problem of high-temperature superconductivity" Comments on "Translation-invariant bipolarons and the problem of high-temperature superconductivity"

2012-04-18

arxiv.org/abs/1204.4142v1

Physics

Condensed Matter

Other Condensed Matter

3 pages, 2 figures, submitted to Solid State Communications

Scientific paper

We comment on the recent results of Refs. [1, 2] on the bipolaron problem
derived using an approximation of Gross - Tulub. It is proved that, contrary to
the claim made in Refs. [1, 2], the bipolaron ground state energy calculated
there in the strong-coupling approximation has not been shown to constitute a
variational upper bound.

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