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The Renormalised Bogoliubov-Fr\"ohlich Hamiltonian

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arxiv 1909.02430 v3 pith:J6U7C3IG submitted 2019-09-05 cond-mat.quant-gas math-phmath.MPquant-ph

classification cond-mat.quant-gasmath-phmath.MPquant-ph
keywords hamiltonianbogoliubov-frmodelsohlichrenormalisedbeenbehaviourbose-einstein
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The Bogoliubov-Fr\"ohlich Hamiltonian models the interaction of an impurity with the excitations of a Bose-Einstein condensate. It has been observed that the dependence of the ground state energy on the ultraviolet cutoff differs significantly from what would be expected from similar well-known models. We give a detailed explanation of this UV behaviour, and provide an explicit representation of the renormalised Hamiltonian.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Ultraviolet Renormalization of Spin Boson Models I. Normal and 2-Nilpotent Interactions

    math-ph 2025-02 conditional novelty 7.0 of 10

    The paper proves that generalized spin-boson models with normal or 2-nilpotent interactions can be ultraviolet renormalized, with norm resolvent convergence of the regularized Hamiltonians to an explicitly constructed...

  2. On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups

    math-ph 2024-12 conditional novelty 7.0 of 10

    For negative coupling, the renormalized non-relativistic and semi-relativistic Nelson semigroups are positivity improving with respect to the Fröhlich cone at every total momentum, proven via Feynman-Kac functional in...

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