m 1 revision imported |
|||
| Line 15: | Line 15: | ||
Early reports also includes Refs. {{onlinecite|deng06a}}. | Early reports also includes Refs. {{onlinecite|deng06a}}. | ||
Recent reports include Refs. {{onlinecite|alnatah24a}}{{onlinecite|alnatah24b}}{{onlinecite|fabricante24a}}. | Recent reports include Refs. {{onlinecite|alnatah24a}}{{onlinecite|alnatah24b}}{{onlinecite|fabricante24a}}{{onlinecite|song25a}}. | ||
Reviews include Refs. {{onlinecite|keeling11a}} | Reviews include Refs. {{onlinecite|keeling11a}} | ||
Polariton condensation describes the problem of, precisely, BEC of polaritons. It is related, but not entirely, to photon condensation (which is not lasing) and even more so, although not entirely either, to polariton lasers.
The first big claim was made by H. Deng et al.[1] in 2002 but its broad recognition was sealed with the paper by J. Kasprzack et al.[2] Shortly after, it was also claimed in a trap.[3] Those were at liquid-He temperature, but claims were then made at room temperature, either for polariton lasing[4][5] or Bose-Einstein condensation.[6]
The question remained for a long time whether BEC is an adequate term for polaritons due to their strongly out-of-equilibrium character. J. Kasprzack et al. later defined two regimes of condensation: kinetic and thermodynamic.[7] An important milestone came with the report of equilibrium polariton BEC, with long-lifetime polaritons trapped in a circular potential and fitting convincingly the Bose-Einstein distribution up to where it shows quantum degeneracy of the ground state.[8]
Beyond macroscopic occupation of the ground state, milestones include the observation of the Bogoliubov spectrum of excitations.[9], spatial coherence[10], two-photon coherence[1][11], polarization pinning[12].
Important theoretical works include Porras & Tejedor's treatment of the linewidth with interactions[13], polariton statistics[14][15]
Early reports also includes Refs. [16].
Recent reports include Refs. [17][18][19][20].
Reviews include Refs. [21]