INTERNSHIP: Vortex pair dynamics in superfluid of light

INTERNSHIP: Vortex pair dynamics in superfluid of light

When light propagates in linear medium (vacuum, air etc), photon behaves as a non-interacting gas, but when the medium is non-linear (atomic vapor or semiconductor microcavity for examples), they start flowing as a liquid called fluid of light. From the medium, photons acquire an effective interaction that may lead to macroscopic coherent behavior. Among the different system allowing to generate such particular fluids, semiconductor microcavities are surely the more advance allowing for the observation of superfluid of light [1,2].

As such vortex pair can appear spontaneously when the superfluid flow through a local potential barrier [3]. In the context of atomic superfluid the dynamics of these topological entities rather are well understood, but in the context of superfluid of light, the picture is blurred. This derived mainly from the open nature of fluids of light in cavities where photons lifetime is so short that the system needs to be continuously pumped with photons. This driving dissipative scheme and its interaction with vortex pair will be at the center of this internship. The student will investigate numerically with a code of its own, the dynamics of these pairs in present of a coherent driving in realistic experimental conditions.

[1] A. Amo, J. Lefrère, S. Pigeon, C. Adrados, C. Ciuti, I. Carusotto, R. Houdré, E. Giacobino, and A. Bramati, “Superfluidity of polaritons in semiconductor microcavities,” Nature Physics 5, 805–810 (2009).[2] I. Carusotto and C. Ciuti “Quantum fluids of light,” Review of Modern Physics 85, 299 (2013).[3] A. Amo, S. Pigeon, D. Sanvitto, V. G. Sala, R. Hivet, I. Carusotto, F. Pisanello, G. Lemenager, R. Houdre, E. Giacobino, C. Ciuti, and A. Bramati, “Polariton superfluids reveal quantum hydrodynamic solitons,” Science 332, 1167–1170 (2011).

Interested candidates should contact Simon Pigeon (simon.pigeon@lkb.upmc.fr)
Numerical internship.
Duration: 3 to 6 months.