Nonzero temperature dynamics of a repulsive two-component Fermi gas
Jaros{\l}aw Ryszkiewicz, Miros{\l}aw Brewczyk, and Tomasz Karpiuk
TL;DR
This paper investigates the finite-temperature spin-dipole oscillations in a two-component Fermi gas, revealing temperature-dependent ferromagnetic phase transitions consistent with experimental observations.
Contribution
It introduces a combined atomic-orbital and Monte Carlo sampling method to analyze finite-temperature dynamics of a repulsive Fermi gas, aligning theoretical results with experimental data.
Findings
Ferromagnetic phase appears at higher repulsion with increasing temperature
Quantitative agreement with recent experimental results
Finite-temperature effects significantly influence spin dynamics
Abstract
We study spin-dipole oscillations of a binary fermionic mixture at nonzero temperatures. We apply the atomic-orbital method combined with the Monte Carlo technique based sampling to probe finite temperatures. Our results agree quantitatively with recent experiment, G. Valtolina et al., Nat. Phys. 13, 704 (2017), showing the appearance of the ferromagnetic phase at stronger repulsion between components when the temperature is increased.
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