Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An all-coupling theory for the Fr\"ohlich polaron   The Fr\"ohlich model describes the interaction of a mobile impurity with a
surrounding bath of phonons which leads to the formation of a quasiparticle,
the polaron. In this article an efficient renormalization group approach is
presented which provides a description of Fr\"ohlich polarons in all regimes
ranging from weak- to strong coupling. We apply the method to the Bose polaron
problem of an ultracold impurity atom interacting with a background gas that is
Bose-condensed. The extended renormalization group approach introduced here is
capable to predict ground state properties for arbitrarily small impurity
masses. This allows us to obtain the full phase diagram of the corresponding
Bogoliubov-Fr\"ohlich Hamiltonian, characterized by two dimensionless coupling
constants. Our method is benchmarked by comparison of the ground state energy
to recent diagrammatic quantum Monte Carlo calculations.

28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int