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Letter
Nature Physics 4, 700–705 (1 September 2008) | doi:10.1038/nphys1034
Observation of Bogoliubov excitations in exciton-polariton condensates
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Abstract
Einstein|[rsquo]|s 1925 paper predicted the occurrence of Bose–Einstein condensation (BEC) in an ideal gas of non-interacting bosonic particles. However, particle–particle interaction and peculiar excitation spectra are keys for understanding BEC and superfluidity physics.
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