Negative Bogoliubov dispersion in exciton-polariton condensates
Negative Bogoliubov dispersion in exciton-polariton condensates
Bogoliubov's theory states that self-interaction effects in Bose-Einstein condensates produce a characteristic linear dispersion at low momenta. One of the curious features of Bogoliubov's theory is that the new quasiparticles in the system are linear combinations of creation and destruction operators of the bosons. In exciton-polariton condensates, this gives the …