The equation of state of a low-temperature Fermi gas with tunable interactions.
Reads0
Chats0
TLDR
The equation of state of a two-component ultracold Fermi gas is measured for a wide range of interaction strengths at low temperature to provide a benchmark for many-body theories and are relevant to other fermionic systems such as the crust of neutron stars.Abstract:
Interacting fermions are ubiquitous in nature, and understanding their thermodynamics is an important problem. We measured the equation of state of a two-component ultracold Fermi gas for a wide range of interaction strengths at low temperature. A detailed comparison with theories including Monte-Carlo calculations and the Lee-Huang-Yang corrections for low-density bosonic and fermionic superfluids is presented. The low-temperature phase diagram of the spin-imbalanced gas reveals Fermi liquid behavior of the partially polarized normal phase for all but the weakest interactions. Our results provide a benchmark for many-body theories and are relevant to other fermionic systems such as the crust of neutron stars.read more
Citations
More filters
Journal ArticleDOI
Quantum simulations with ultracold quantum gases
TL;DR: In this paper, a review of advances in this field is presented and discussed the possibilities offered by this approach to quantum simulation, as well as the possibilities of quantum simulation with ultracold quantum gases.
Journal ArticleDOI
Spinor Bose gases: Symmetries, magnetism, and quantum dynamics
Dan Stamper-Kurn,Masahito Ueda +1 more
TL;DR: In this paper, a review of the experimental techniques used for characterizing spinor gases, their mean-field and many-body ground states, both in isolation and under the application of symmetry-breaking external fields, are discussed.
Journal ArticleDOI
Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid
Lauriane Chomaz,S. Baier,D. Petter,Manfred J. Mark,Manfred J. Mark,F. Wächtler,Luis Santos,Francesca Ferlaino,Francesca Ferlaino +8 more
TL;DR: Experiments with ultracold magnetic atoms reveal liquid-like quantum droplets that are 20 times larger than previously observed droplets as discussed by the authors, which is the largest known quantum droplet size.
Book ChapterDOI
The BCS-BEC crossover and the unitary fermi gas
TL;DR: In this paper, it was shown that the ultracold Fermi gases exhibited behavior that, with the turn of a knob, could be made to span the entire range from BCS to BEC.
Journal ArticleDOI
Metastability and coherence of repulsive polarons in a strongly interacting Fermi mixture
Christoph Kohstall,Matteo Zaccanti,Michael Jag,Andreas Trenkwalder,Pietro Massignan,Georg M. Bruun,Florian Schreck,Rudolf Grimm +7 more
TL;DR: In this paper, the authors used radio-frequency spectroscopy to identify a long-lived, metastable quasiparticle in a lithium-potassium Fermi mixture with strongly repulsive interactions.
References
More filters
Journal ArticleDOI
Fermionic Superfluidity with Imbalanced Spin Populations
TL;DR: 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.
Journal ArticleDOI
Exploring the Thermodynamics of a Universal Fermi Gas
TL;DR: It is shown that, despite strong interactions, the normal phase behaves as a mixture of two ideal gases: a Fermi gas of bare majority atoms and a non-interacting gas of dressed quasi-particles, the fermionic polarons.
Journal ArticleDOI
Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
TL;DR: The polaron energy and the quasiparticle residue for various interaction strengths around a Feshbach resonance are determined and the transition from polaronic to molecular binding is observed at a critical interaction.
Journal ArticleDOI
Large momentum part of a strongly correlated Fermi gas
TL;DR: In this paper, it was shown that the magnitude of the Fermi tail is equal to the adiabatic derivative of the energy with respect to the reciprocal of the scattering length, multiplied by a simple constant.