Volume 114, Number 2, April 2016
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||18 May 2016|
Analog simulation of Weyl particles with cold atoms
1 Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC, Collège de France 24, rue Lhomond, 75005 Paris, France
2 Mathematical Sciences, University of Southampton - Highfield Southampton, SO17 1BJ, UK
3 Department of Physics, University of Massachusetts - Amherst, MA 01003, USA
Received: 25 April 2016
Accepted: 1 May 2016
In this letter we report on a novel approach to study the dynamics of harmonically confined Weyl particles using magnetically trapped fermionic atoms. We find that after a kick of its center of mass, the system relaxes towards a steady state even in the absence of interactions, in stark contrast with massive particles which would oscillate without damping. Remarkably, the equilibrium distribution is non-Boltzmann, exhibiting a strong anisotropy which we study both numerically and experimentally.
PACS: 67.85.-d – Ultracold gases, trapped gases / 05.20.Dd – Kinetic theory / 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© EPLA, 2016
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