We report on pure-quantum-state polariton condensates in optical annular traps. The study of the underlying mechanism reveals that the polariton wavefunction always coalesces in a single pure-quantum-state that, counter-intuitively, is always the uppermost confined state with the highest overlap to the exciton reservoir. The tunability of such states combined with the short polariton lifetime allows for ultrafast transitions between coherent mesoscopic wavefunctions of distinctly different symmetries rendering optically confined polariton condensates a promising platform for applications such as many-body quantum circuitry and continuous-variable quantum processing.
@article{arxiv.1411.4579,
title = {Robust platform for engineering pure-quantum-state transitions in polariton condensates},
author = {A. Askitopoulos and T. C. H. Liew and H. Ohadi and Z. Hatzopoulos and P. G. Savvidis and P. G. Lagoudakis},
journal= {arXiv preprint arXiv:1411.4579},
year = {2015}
}