The experimental investigation of spontaneously created vortices is of utmost importance for the understanding of quantum phase transitions towards a superfluid phase, especially for two-dimensional systems that are expected to be governed by the Berezinski-Kosterlitz-Thouless physics. By means of time-resolved near-field interferometry we track the path of such vortices, created at random locations in an exciton-polariton condensate under pulsed nonresonant excitation, to their final pinning positions imposed by the stationary disorder. We formulate a theoretical model that successfully reproduces the experimental observations.
- quantum vortices
- polariton superfluids
- quantum phase transitions
Lagoudakis, K. G., Manni, F., Pietka, B., Wouters, M., Liew, T. C. H., Savona, V., ... Deveaud-Plédran, B. (2011). Probing the dynamics of spontaneous quantum vortices in polariton superfluids. Phys. Rev. Lett., 106(11), . https://doi.org/10.1103/PhysRevLett.106.115301