Spiraling, splitting and branching dynamics of quantum vortices in a nonlinear polariton fluid
What is it about?
Polariton fluids made of coupled photonic and electronic oscillations have a polarization degree of freedom which can sustain both integer and half-integer quantized vortices. The photonic outcoupling makes possible to track their wavefunction, mapping both the density and phase in time by use of resonant ultrafast imaging.
Why is it important?
Here we could for the first time directly set a polariton condensate carrying either a full or half vortex as initial condition to see their dynamical behavior. We show for the first time the spiraling of an half-vortex, and the branching of FV and HV as vortex lines in a 2D+t domain. We illustrate how the out-of-equilibrium nature of the polariton fluid results in that the vortex trajectories are not driven by intrinsic thermodynamic energy considerations, rather by a kinetic interplay of factors such as the nonlinearity and the disorder background with its associated polarization splitting.
The following have contributed to this page: Dr Lorenzo Dominici