Spatial correlation of two-dimensional Bosonic multimode condensates
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The Berezinskii-Kosterlitz-Thouless (BKT) theorem predicts that two-dimensional Bosonic condensates exhibit quasi-long-range order which is characterized by a slow decay of the spatial coherence. However previous measurements on exciton-polarition condensates revealed that their spatial coherence can decay faster than allowed under the BKT theory, and different theoretical explanations have already been proposed. Through theoretical and experimental study of exciton-polariton condensates, we show that the fast decay of the coherence can be explained through the simultaneous presence of multiple modes in the condensate.
Nitsche , W H , Kim , N Y , Roumpos , G , Schneider , C , Höfling , S , Forchel , A & Yamamoto , Y 2016 , ' Spatial correlation of two-dimensional Bosonic multimode condensates ' Physical Review. A, Atomic, molecular, and optical physics , vol 93 , no. 5 , 053622 . DOI: 10.1103/PhysRevA.93.053622
Physical Review. A, Atomic, molecular, and optical physics
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