Reply to "on the cutoff parameter in the translation-invariant theory of the strong coupling polaron"

S.N. Klimin, J.T. Devreese

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The present work is a reply to the paper [1]. It is proven that the argumentation of Refs. [1] is inconsistent. The variational functional for the polaron ground state energy considered in Ref. [1] contains an incomplete recoil energy. Since the variational functional of Ref. [1] is incomplete, it is not proven to provide a variational upper bound for the polaron ground-state energy. The same conclusion follows also for the bipolaron ground-state energy.

Original languageEnglish
Pages (from-to)58-59
Number of pages2
JournalSolid State Communications
Issue number1
Publication statusPublished - 1 Jan 2013



  • D. Bipolarons
  • D. Fröhlich Hamiltonian
  • D. Polarons

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