3 PhD thesis offers, Laser Physics Institute, CNRS, Université Paris Nord, France

 

_Cold atoms for giant Casimir-Poler effect_

We propose a hybrid experiment with cold atoms passing through a home-made 100 nm period nanogratings.  Such a situation is unprecedented and opens advance studies on Casimir-Polder atom surface interactions below 50 nm. Fundamental theoretical physics can be confronted with experiment as e.g. random quantum walk or a novel 5^th force constraint. A material compact interferometer (laser free) is envisaged.

Please contact: gabriel.dutier@univ-paris13.fr <mailto:gabriel.dutier@univ-paris13.fr>

http://www-lpl.univ-paris13.fr/UK/EQUIPE-OIA-PAGE-01.awp <http://www-lpl.univ-paris13.fr/UK/EQUIPE-OIA-PAGE-01.awp>

_Quantum magnetism of large-spin fermions _

We propose to study the magnetic properties of ultra-cold strontium atoms trapped in periodic potentials made of a 3D optical lattice. Compared to s=1/2 electrons, strontium atoms possess an enlarged spin degrees of freedom, due to its nuclear spin F=9/2. This allows to explore quantum many-body physics and quantum magnetism in a completely new situation, where, for example, the magnetic phases at low temperature are expected to crucially depend on an interplay between the number of spin states and the lattice topology.

Please contact: martin.rdsv@univ-paris13.fr <mailto:martin.rdsv@univ-paris13.fr>

http://www-lpl.univ-paris13.fr/gqm/ <http://www-lpl.univ-paris13.fr/gqm/>

_Fast rotating 2D superfluids_

We propose to investigate the physics of fast rotating two-dimensional superfluids. In particular the PhD student will study the stability of a supersonic flow, recently obtained in the group [1], by implementing a non destructive in-situ imaging technique and recording the density profile evolution in the presence of a perturbation. A complex nonlinear dynamics is expected, involving for example shock waves formation. He/she will acquire a state of the art know-how on atom cooling, trapping, manipulation with radio-frequency fields and data analysis.

[1] Y. Guo, et al., PRL 124 (2020) 025301

Please contact : romain.dubessy@univ-paris13.fr <mailto:romain.dubessy@univ-paris13.fr>

http://www-lpl.univ-paris13.fr/bec/ <http://www-lpl.univ-paris13.fr/bec/>