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27 papers · 2 filters
The interaction-sensitive states of a trapped two-component ideal Fermi gas and application to the virial expansion of the unitary Fermi gas
Shimpei Endo, Yvan Castin
We consider a two-component ideal Fermi gas in an isotropic harmonic potential. Some eigenstates have a wavefunction that vanishes when two distinguishable fermions are at the same…
Stochastic precession of the polarization in a polariton laser
Vera Giulia Sala, Félix Marsault, Michiel Wouters +5
Microcavity polaritons in the lasing regime undergo a spontaneous symmetry breaking transition resulting in coherent emission with a well defined polarization. The order parameter…
Critical Velocity and Dissipation of an ultracold Bose-Fermi Counterflow
Marion Delehaye, Sébastien Laurent, Igor Ferrier-Barbut +3
We study the dynamics of counterflowing bosonic and fermionic lithium atoms. First, by tuning the interaction strength we measure the critical velocity vc of the system in the BEC-…
Concavity of the collective excitation branch of a Fermi gas in the BEC-BCS crossover
H Kurkjian, Yvan Castin, A Sinatra
We study the concavity of the dispersion relation of the bosonic excitations of a three-dimensional spin- Fermi gas in the Random Phase Approximatio…
Phase diagram of the 3D Anderson model for uncorrelated speckle potentials
Michael Pasek, Zheng Zhao, Dominique Delande +1
We investigate the localization properties of atoms moving in a three-dimensional optical lattice in the presence of an uncorrelated disorder potential having the same probability…
Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture
J. Ulmanis, S. Häfner, R. Pires +4
We study Efimov resonances via three-body loss in an ultracold two-component gas of fermionic Li and bosonic Cs atoms close to a Feshbach resonance at 843~G, extending…