# Superfluid-normal quantum phase transitions in an imbalanced Fermi gas

@article{Caldas2020SuperfluidnormalQP, title={Superfluid-normal quantum phase transitions in an imbalanced Fermi gas}, author={Heron Caldas}, journal={Journal of Physics B: Atomic, Molecular and Optical Physics}, year={2020} }

We investigate the superfluid-to-normal zero temperature quantum phase transitions of asymmetric two-component Fermi gases as a function of the chemical potential imbalance $h$. The calculations are performed for homogeneous and trapped imbalanced systems. We concentrate at unitarity, characterized by a divergent interaction parameter $k_F a$, where most of the current experiments are realized. For homogeneous systems, we determine the critical chemical potential imbalance $h_c$ at which…

## One Citation

The Gor'kov and Melik‐Barkhudarov Correction to an Imbalanced Fermi Gas in the Presence of Impurities

- PhysicsAnnalen der Physik
- 2022

The effects of induced interactions are calculated in both clean and dirty situations, for balanced and imbalanced Fermi gases. The effects of nonmagnetic impurities on the induced interactions…

## References

SHOWING 1-10 OF 79 REFERENCES

Superfluidity in Two-Dimensional Imbalanced Fermi Gases

- Physics
- 2011

We study the zero temperature ground state of a two-dimensional atomic Fermi gas with chemical potential and population imbalance in the mean-field approximation. All calculations are performed in…

Fermionic Superfluidity with Imbalanced Spin Populations

- PhysicsScience
- 2006

The superfluidity regime was established in a two-state mixture of ultracold fermionic atoms with imbalanced state populations and the quantum phase transition to the normal state was characterized, known as the Pauli limit of superfluidity.

Imbalanced Feshbach-resonant Fermi gases

- Physics
- 2010

We present an overview of recent developments in species-imbalanced ('polarized') Feshbach-resonant Fermi gases. We summarize the current status of thermodynamics of these systems in terms of a phase…

Cold asymmetrical fermion superfluids

- Physics
- 2003

In this work we investigate the general properties and the ground state of an asymmetrical dilute gas of cold fermionic atoms, formed by two particle species having different densities. We have shown…

Phase structure of spin-imbalanced unitary Fermi gases

- Physics
- 2015

We investigate the phase structure of spin-imbalanced unitary Fermi gases beyond mean-field theory by means of the Functional Renormalization Group. In this approach, quantum and thermal fluctuations…

Observation of phase separation in a strongly interacting imbalanced fermi gas.

- PhysicsPhysical review letters
- 2006

The in situ distribution of the density difference between two trapped spin components is obtained using phase-contrast imaging and 3D image reconstruction and the phase transition induces a dramatic change in the density profiles as excess fermions are expelled from the superfluid.

Universal Phase Diagram and Scaling Functions of Imbalanced Fermi Gases

- PhysicsJournal of Experimental and Theoretical Physics
- 2018

We discuss the phase diagram and the universal scaling functions of attractive Fermi gases at finite imbalance. The existence of a quantum multicritical point for the unitary gas at vanishing…

Phase Separation and Pair Condensation in a Spin-Imbalanced 2D Fermi Gas.

- PhysicsPhysical review letters
- 2016

The observation of zero momentum pair condensates in 2D spin-imbalanced gases opens the way to explorations of more exotic superfluid phases that occupy a large part of the phase diagram in lower dimensions.

Pairing and Phase Separation in a Polarized Fermi Gas

- PhysicsScience
- 2006

We report the observation of pairing in a gas of atomic fermions with unequal numbers of two components. Beyond a critical polarization, the gas separates into a phase that is consistent with a…

Normal phase of an imbalanced Fermi gas.

- PhysicsPhysical review letters
- 2010

In this Letter, a simple theory is devised to describe dilute Fermi-polaron ensembles corresponding to the normal phase of an imbalanced Fermani gas, and an exact formula is obtained for the dominant interaction between polarons.