Repulsive Fermi and Bose polarons in quantum gases

F Scazza, M Zaccanti, P Massignan, MM Parish… - Atoms, 2022 - mdpi.com
Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary
excitations of a many-particle background. In the field of ultracold atoms, the study of the …

Self-bound Bose–Fermi liquids in lower dimensions

D Rakshit, T Karpiuk, P Zin, M Brewczyk… - New Journal of …, 2019 - iopscience.iop.org
We study weakly interacting mixtures of ultracold atoms composed of bosonic and fermionic
species in 2D and 1D. When interactions between particles are appropriately tuned, self …

Quantum Bose-Fermi droplets

D Rakshit, T Karpiuk, M Brewczyk, M Gajda - SciPost Physics, 2019 - scipost.org
We study the stability of a zero temperature mixture of attractively interacting degenerate
bosons and spin-polarized fermions in the absence of confinement. We demonstrate that …

Probing ferromagnetic order in few-fermion correlated spin-flip dynamics

GM Koutentakis, SI Mistakidis… - New Journal of …, 2019 - iopscience.iop.org
We unravel the dynamical stability of a fully polarized one-dimensional ultracold few-fermion
spin-1/2 gas subjected to inhomogeneous driving of the itinerant spins. Despite the unstable …

Mechanism for sound dissipation in a two-dimensional degenerate Fermi gas

K Gawryluk, M Brewczyk - Scientific Reports, 2024 - nature.com
We numerically study the transport properties of a two-dimensional Fermi gas in a weakly
and strongly interacting regimes, in the range of temperatures close to the transition to a …

Breathing mode of a Bose-Einstein condensate immersed in a Fermi sea

PT Grochowski, T Karpiuk, M Brewczyk, K Rzążewski - Physical Review Letters, 2020 - APS
By analyzing the breathing mode of a Bose-Einstein condensate repulsively interacting with
a polarized fermionic cloud, we further the understanding of a Bose-Fermi mixture recently …

Phase transitions of repulsive two-component Fermi gases in two dimensions

MI Trappe, PT Grochowski, JH Hue… - New Journal of …, 2021 - iopscience.iop.org
We predict the phase separations of two-dimensional Fermi gases with repulsive contact-
type interactions between two spin components. Using density-potential functional theory …

Itinerant ferromagnetism of a dipolar Fermi gas with Raman-induced spin-orbit coupling

XJ Feng, XD Zhao, L Qin, YY Zhang, Z Zhu, HJ Tian… - Physical Review A, 2022 - APS
We elucidate the itinerant ferromagnetism of a dipolar Fermi gas with a Raman-induced spin-
orbit coupling by investigating the exotic phase diagrams. It is revealed that the dipolar …

Interplay of phase separation and itinerant magnetism for correlated few fermions in a double-well

GM Koutentakis, SI Mistakidis… - New Journal of …, 2020 - iopscience.iop.org
We explore the stability of the phase separation phenomenon in few-fermion spin-1/2
systems confined in a double-well potential. It is shown that within the SU (2) symmetric …

Many-body molecule formation at a domain wall in a one-dimensional strongly interacting ultracold Fermi gas

A Syrwid, M Łebek, PT Grochowski, K Rzążewski - Physical Review A, 2022 - APS
We analyze how the presence of the bound state on top of strong intercomponent contact
repulsion affects the dynamics of a two-component ultracold Fermi gas confined in a one …