Functional-renormalization-group approach to strongly coupled Bose-Fermi mixtures in two dimensions

@article{vonMilczewski2022Functionalrenormalizationgro,
  title={Functional-renormalization-group approach to strongly coupled Bose-Fermi mixtures in two dimensions},
  author={Jonas von Milczewski and F{\'e}lix Rose and Richard Schmidt},
  journal={Physical Review A},
  year={2022}
}
We study theoretically the phase diagram of strongly coupled two-dimensional Bose-Fermi mixtures interacting with attractive short-range potentials as a function of the particle densities. We focus on the limit where the size of the bound state between a boson and a fermion is small compared to the average interboson separation and develop a functional-renormalization-group approach that accounts for the bound-state physics arising from the extended Fröhlich Hamiltonian. By including three-body… 

Weakly-Interacting Bose–Bose Mixtures from the Functional Renormalisation Group

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References

SHOWING 1-10 OF 37 REFERENCES

Attractive and repulsive Fermi polarons in two dimensions

TLDR
Fermi polarons are created and investigated in a two-dimensional, spin-imbalanced Fermi gas, measuring their spectral function using momentum-resolved photoemission spectroscopy and finding evidence for a disputed pairing transition between polarons and tightly bound dimers, which provides insight into the elementary pairing mechanism of imbalanced, strongly coupled two- dimensional Fermu gases.

Non-Perturbative Renormalization Group calculation of the transition temperature of the weakly interacting Bose gas

We present a new approximation scheme to solve the Non-Perturbative Renormalization Group equations and obtain the full momentum dependence of n-point functions. The core of the method consists in

Superfluidity near phase separation in Bose-Fermi mixtures

We study the transition to fermion pair superfluidity in a mixture of interacting bosonic and fermionic atoms. The fermion interaction induced by the bosons and the dynamical screening of the

Analytical theory of the dressed bound state in highly polarized Fermi gases

We present an analytical treatment of a single ↓-atom within a Fermi sea of ↑-atoms, when the interaction is strong enough to produce a bound state, dressed by the Fermi sea. Our method makes use of

Topological order, emergent gauge fields, and Fermi surface reconstruction

  • S. Sachdev
  • Physics
    Reports on progress in physics. Physical Society
  • 2019
This review describes how topological order associated with the presence of emergent gauge fields can reconstruct Fermi surfaces of metals, even in the absence of translational symmetry breaking. We

Bose polarons near quantum criticality

TLDR
Bose polarons are created by immersing atomic impurities in a Bose-Einstein condensate (BEC) with near-resonant interactions using radiofrequency spectroscopy to probed the energy, spectral width, and short-range correlations of the impurities as a function of temperature.

BCS-BEC crossover in two dimensions: A quantum Monte Carlo study

We investigate the crossover from Bardeen-Cooper-Schrieffer (BCS) superfluidity to Bose-Einstein condensation (BEC) in a two-dimensional Fermi gas at T = 0 using the fixed-node diffusion Monte Carlo