Full Stark Control of Polariton States on a Spin-Orbit Hypersphere
  The orbital angular momentum and the polarisation of light are physical quantities widely investigated for classical and quantum information processing. In this work we propose to take advantage of strong light-matter coupling, circular-symmetric confinement, and transverse-electric transverse-magnetic splitting to exploit states where these two degrees of freedom are combined. To this end we develop a model based on a spin-orbit Poincar\'{e} hypersphere. Then we consider the example of semiconductor polariton systems and demonstrate full ultrafast Stark control of spin-orbit states. Moreover, by controlling states on three different spin-orbit spheres and switching from one sphere to another we demonstrate the control of different logic bits within one single physical system. 
Feng Li, Emiliano Cancellieri, Giuseppe Buonaiuto, Maurice S.   Skolnick, Dimitri N. Krizhanovskii, David M. Whittaker
cond-mat.mes-hall quant-ph