1204.4142 (S. N. Klimin et al.)

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

S. N. Klimin, J. T. Devreese

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.

View original: http://arxiv.org/abs/1204.4142