Coherence measurements of polaritons in thermal equilibrium reveal a power law for two-dimensional condensates.
Sci Adv
; 10(18): eadk6960, 2024 May 03.
Article
em En
| MEDLINE
| ID: mdl-38701210
ABSTRACT
We have created a spatially homogeneous polariton condensate in thermal equilibrium, up to very high condensate fraction. Under these conditions, we have measured the coherence as a function of momentum and determined the total coherent fraction of this boson system from very low density up to density well above the condensation transition. These measurements reveal a consistent power law for the coherent fraction as a function of the total density over nearly three orders of its magnitude. The same power law is seen in numerical simulations solving the two-dimensional Gross-Pitaevskii equation for the equilibrium coherence.
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MEDLINE
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Ano de publicação:
2024
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Article