@article{article, title  = {{Effect of polariton-polariton interactions on the excitation spectrum of
  a non-equilibrium condensate in a periodic potential}},

 url = {{http://dx.doi.org/10.1103/PhysRevB.87.155423 }},

 year = {{2013}},

 month = {{4}},

 author = {{Krizhanovskii DN and Cerda EA and Gavrilov SS and Sarkar D and Guda K and Bradley R and Santos PV and Hey R and Biermann K and Sich M and Fras F et al}},

 note = {{Accessed on 2025/11/25}}}