The Fermix Lab
The Fermix machine
Using laser and magnetic cooling and manipulation techniques, the Fermix machine brings a cloud of 40K down to the quantum degenerate regime where quantum mechanics dictates the macroscopic behaviour of the atoms. Using the so-called Feshbach resonance phenomenon, it is then possible to control the interactions between the atoms and to achieve a strongly interacting regime where quantum correlations are so strong that theoretical description becomes challenging even for state of the art numerical techniques.
Picture of an array of 1D Fermi gases. The distance between two tubes is 2.5µm and each tube contains typically a few hundred atoms
From ultracold to ultrafast
It is possible to show that the dynamics of an ensemble of massive particles confined in linear magnetic trap is described by the same Hamiltonian as that of massless relativistic particles confined in a harmonic trap. We have shown that even in the absence of interactions, this system relaxes towards a equilibrium state that is only partially thermalized and keeps some memory of the excitation.
Poincaré's map of a particle in quadrupole trap.